Solve using substitution. 8x + 9y = –17 y = –9

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asked Feb 5, 2023 176k views

1 Answer

Schlangi · Answer 1 · 2023-02-10T06:53:32+0000

SUBSTITUTE -9 as y in the equation

8x + 9(-9) = -17
8x + (-81) = -17
8x -81 = -17

COLLECT LIKE TERMS

8x = -17 + 81
8x = 81 - 17
8x = 64

DIVIDE BOTH SIDES BY 8

8x/8 = 64/8
x = 8

Therefore, y = -9 and x = 8

Solve using substitution. 8x + 9y = –17 y = –9

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