Solve for x 4/5x-1/8=7/10x-8/5

$\frac{4}{5} x - \frac{1}{8} = \frac{7}{10} x - \frac{8}{5}$

Step 1

Combine $\frac{4}{5}$ and $x$ .

$\frac{4 x}{5} - \frac{1}{8} = \frac{7}{10} x - \frac{8}{5}$

Step 2

Combine $\frac{7}{10}$ and $x$ .

$\frac{4 x}{5} - \frac{1}{8} = \frac{7 x}{10} - \frac{8}{5}$

Step 3

Move all terms containing $x$ to the left side of the equation.

Subtract $\frac{7 x}{10}$ from both sides of the equation.

$\frac{4 x}{5} - \frac{1}{8} - \frac{7 x}{10} = - \frac{8}{5}$

To write $\frac{4 x}{5}$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$\frac{4 x}{5} \cdot \frac{2}{2} - \frac{7 x}{10} - \frac{1}{8} = - \frac{8}{5}$

Write each expression with a common denominator of $10$ , by multiplying each by an appropriate factor of $1$ .

Multiply $\frac{4 x}{5}$ by $\frac{2}{2}$ .

$\frac{4 x \cdot 2}{5 \cdot 2} - \frac{7 x}{10} - \frac{1}{8} = - \frac{8}{5}$

Multiply $5$ by $2$ .

$\frac{4 x \cdot 2}{10} - \frac{7 x}{10} - \frac{1}{8} = - \frac{8}{5}$

Combine the numerators over the common denominator.

$\frac{4 x \cdot 2 - 7 x}{10} - \frac{1}{8} = - \frac{8}{5}$

Simplify each term.

Simplify the numerator.

Factor $x$ out of $4 x \cdot 2 - 7 x$ .

Factor $x$ out of $4 x \cdot 2$ .

$\frac{x (4 \cdot 2) - 7 x}{10} - \frac{1}{8} = - \frac{8}{5}$

Factor $x$ out of $- 7 x$ .

$\frac{x (4 \cdot 2) + x \cdot - 7}{10} - \frac{1}{8} = - \frac{8}{5}$

Factor $x$ out of $x (4 \cdot 2) + x \cdot - 7$ .

$\frac{x (4 \cdot 2 - 7)}{10} - \frac{1}{8} = - \frac{8}{5}$

Multiply $4$ by $2$ .

$\frac{x (8 - 7)}{10} - \frac{1}{8} = - \frac{8}{5}$

Subtract $7$ from $8$ .

$\frac{x \cdot 1}{10} - \frac{1}{8} = - \frac{8}{5}$

Multiply $x$ by $1$ .

$\frac{x}{10} - \frac{1}{8} = - \frac{8}{5}$

Step 4

Move all terms not containing $x$ to the right side of the equation.

Add $\frac{1}{8}$ to both sides of the equation.

$\frac{x}{10} = - \frac{8}{5} + \frac{1}{8}$

To write $- \frac{8}{5}$ as a fraction with a common denominator, multiply by $\frac{8}{8}$ .

$\frac{x}{10} = - \frac{8}{5} \cdot \frac{8}{8} + \frac{1}{8}$

To write $\frac{1}{8}$ as a fraction with a common denominator, multiply by $\frac{5}{5}$ .

$\frac{x}{10} = - \frac{8}{5} \cdot \frac{8}{8} + \frac{1}{8} \cdot \frac{5}{5}$

Write each expression with a common denominator of $40$ , by multiplying each by an appropriate factor of $1$ .

Multiply $\frac{8}{5}$ by $\frac{8}{8}$ .

$\frac{x}{10} = - \frac{8 \cdot 8}{5 \cdot 8} + \frac{1}{8} \cdot \frac{5}{5}$

Multiply $5$ by $8$ .

$\frac{x}{10} = - \frac{8 \cdot 8}{40} + \frac{1}{8} \cdot \frac{5}{5}$

Multiply $\frac{1}{8}$ by $\frac{5}{5}$ .

$\frac{x}{10} = - \frac{8 \cdot 8}{40} + \frac{5}{8 \cdot 5}$

Multiply $8$ by $5$ .

$\frac{x}{10} = - \frac{8 \cdot 8}{40} + \frac{5}{40}$

Combine the numerators over the common denominator.

$\frac{x}{10} = \frac{- 8 \cdot 8 + 5}{40}$

Simplify the numerator.

Multiply $- 8$ by $8$ .

$\frac{x}{10} = \frac{- 64 + 5}{40}$

Add $- 64$ and $5$ .

$\frac{x}{10} = \frac{- 59}{40}$

Move the negative in front of the fraction.

$\frac{x}{10} = - \frac{59}{40}$

Step 5

Multiply both sides of the equation by $10$ .

$10 \frac{x}{10} = 10 (- \frac{59}{40})$

Step 6

Simplify both sides of the equation.

Simplify the left side.

Cancel the common factor of $10$ .

Cancel the common factor.

$10 \frac{x}{10} = 10 (- \frac{59}{40})$

Rewrite the expression.

$x = 10 (- \frac{59}{40})$

Simplify the right side.

Simplify $10 (- \frac{59}{40})$ .

Cancel the common factor of $10$ .

Move the leading negative in $- \frac{59}{40}$ into the numerator.

$x = 10 (\frac{- 59}{40})$

Factor $10$ out of $40$ .

$x = 10 \frac{- 59}{10 (4)}$

Cancel the common factor.

$x = 10 \frac{- 59}{10 \cdot 4}$

Rewrite the expression.

$x = \frac{- 59}{4}$

Move the negative in front of the fraction.

$x = - \frac{59}{4}$

Step 7

The result can be shown in multiple forms.

Exact Form:

$x = - \frac{59}{4}$

Decimal Form:

$x = - 14.75$

Mixed Number Form:

$x = - 14 \frac{3}{4}$

Solve for x 4/5x-1/8=7/10x-8/5

Related Questions

Support LCMGCF.com by disabling your adblocker.