Find Three Ordered Pair Solutions y=-2x+21

$y = - 2 x + 21$

Step 1

Choose any value for $x$ that is in the domain to plug into the equation.

Step 2

Choose $0$ to substitute in for $x$ to find the ordered pair.

Remove parentheses.

$y = - 2 \cdot 0 + 21$

Simplify $- 2 \cdot 0 + 21$ .

Multiply $- 2$ by $0$ .

$y = 0 + 21$

Add $0$ and $21$ .

$y = 21$

Use the $x$ and $y$ values to form the ordered pair.

$(0, 21)$

Step 3

Choose $1$ to substitute in for $x$ to find the ordered pair.

Remove parentheses.

$y = - 2 \cdot 1 + 21$

Simplify $- 2 \cdot 1 + 21$ .

Multiply $- 2$ by $1$ .

$y = - 2 + 21$

Add $- 2$ and $21$ .

$y = 19$

Use the $x$ and $y$ values to form the ordered pair.

$(1, 19)$

Step 4

Choose $2$ to substitute in for $x$ to find the ordered pair.

Remove parentheses.

$y = - 2 \cdot 2 + 21$

Simplify $- 2 \cdot 2 + 21$ .

Multiply $- 2$ by $2$ .

$y = - 4 + 21$

Add $- 4$ and $21$ .

$y = 17$

Use the $x$ and $y$ values to form the ordered pair.

$(2, 17)$

Step 5

These are three possible solutions to the equation.

$(0, 21), (1, 19), (2, 17)$

Step 6