Solve for y
y=8350
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-12800+8y-4500\times 12=0
Multiply -3200 and 4 to get -12800.
-12800+8y-54000=0
Multiply 4500 and 12 to get 54000.
-66800+8y=0
Subtract 54000 from -12800 to get -66800.
8y=66800
Add 66800 to both sides. Anything plus zero gives itself.
y=\frac{66800}{8}
Divide both sides by 8.
y=8350
Divide 66800 by 8 to get 8350.
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