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
Step-by-step explanation:
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solve for y in the equation 8x-4y=89 when x=7
[tex]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[/tex]
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