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4 years ago

9x + 7y = -12 find the value of y when x equals 1

Mathematics

2 answers:

lutik1710 [3]4 years ago

7 0

Answer:

y = -3

Step-by-step explanation:

9x + 7y = -12

9(1) + 7y = -12

9 + 7y = -12

7y = -12 - 9

7y = -21 (divide both sides by 7)

y = -3

Dafna11 [192]4 years ago

5 0

Answer:

y = -3

Step-by-step explanation:

9x + 7y = -12

Let x = 1

9 (1) + 7y = -12

9 + 7y = -12

Subtract 9 from each side

9 -9 + 7y = -12-9

7y = -21

Divide each side by 7

7y/7 = -21/7

y = -3

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look at the attached picture

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Read 2 more answers