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e-lub [12.9K]
4 years ago
6

Solve the equations by elimination. -7x-8y=9 -4x+9y=-22

Mathematics
1 answer:
Sergeeva-Olga [200]4 years ago
4 0

Solve for x in -7x - 8y = 9

x = -9 + 8y/7

Substitute x = -9 + 8y/7 into -4x + 9y = -22

4(9 + 8y)/7 + 9y = -22

Solve for y in 4(9 + 8y)/7 + 9y = -22

y = -2

Substitute y = -2 into x = -9 + 8y/7

x = 1

Thus,

<u>x = 1</u>

<u>y = -2</u>

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