Question

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

Answer 1

y = -3

Explanation:

9x + 7y = -12

9(1) + 7y = -12

9 + 7y = -12

7y = -12 - 9

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

y = -3

Answer 2

y = -3

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