Question

Solve for y in the equation 8x-4y=89 when x=7

Answer 1

Step-by-step explanation:

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solve for y in the equation 8x-4y=89 when x=7

$8x - 4y = 89(when \: x \: = 7(given)) \\ 8 \times 7 - 4y = 89 \\ 56 - 4y = 89 \\ 4y = 89 - 56 \\ 4y = 33 \\ y = 33 \div 4 \\ y = 8.25$

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Answer 2

Answer:

-8.25

Step-by-step explanation:

8x - 4y = 89

x = 7

7  x 8 = 56

56 - 4y = 89

Minus 56 on each side.

-4y = 33

Divide by -4 each side.

y = -8.25