Examples

y = 3 x - 21

$y = 3 x - 21$ ,

(- 7, 0)

$(- 7, 0)$

Step 1

Insert the values of

x = - 7

$x = - 7$ and

y = 0

$y = 0$ into the equation to find if the ordered pair is a solution.

0 = 3 (- 7) - 21

$0 = 3 (- 7) - 21$

Step 2

Simplify

3 (- 7) - 21

$3 (- 7) - 21$ .

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Step 2.1

Multiply

3

$3$ by

- 7

$- 7$ .

0 = - 21 - 21

$0 = - 21 - 21$

Step 2.2

Subtract

21

$21$ from

- 21

$- 21$ .

0 = - 42

$0 = - 42$

0 = - 42

$0 = - 42$

Step 3

Since

0 \neq - 42

$0 \neq - 42$ , there are no solutions.

No solution

Step 4

Since the equation is not true when the values are used, the ordered pair is not a solution.

The ordered pair is not a solution to the equation.

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