Precalculus Examples

$(7, 8)$ , $x + 9 y = 4$

Step 1

Insert the values of $x = 7$ and $y = 8$ into the equation to find if the ordered pair is a solution.

$(7) + 9 (8) = 4$

Step 2

Simplify $(7) + 9 (8)$ .

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Step 2.1

Multiply $9$ by $8$ .

$7 + 72 = 4$

Step 2.2

Add $7$ and $72$ .

$79 = 4$

Step 3

Since $79 \neq 4$ , 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.