Question

Solve the system by substitution.

Answer 1

(-7, -7)

Explanation:

y = x; x = y

9x - 2y = -49

9(y) - 2y = -49

9y - 2y = -49

7y = -49

÷7 ÷7

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y = -7

y = x

-7 = x

or

9x - 2y = -49

9x - 2(-7) = -49

9x + 14 = -49

-14 -14

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9x = -63

÷9 ÷9

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x = -7

(-7, -7)

I hope this helps!