Solve for a s=(a+b+c)/2

$s = \frac{a + b + c}{2}$

Step 1

Rewrite the equation as $\frac{a + b + c}{2} = s$ .

$\frac{a + b + c}{2} = s$

Step 2

Multiply both sides of the equation by $2$ .

$2 \frac{a + b + c}{2} = 2 s$

Step 3

Simplify the left side.

Cancel the common factor of $2$ .

Cancel the common factor.

$2 \frac{a + b + c}{2} = 2 s$

Rewrite the expression.

$a + b + c = 2 s$

Step 4

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

Subtract $b$ from both sides of the equation.

$a + c = 2 s - b$

Subtract $c$ from both sides of the equation.

$a = 2 s - b - c$