Solve for y
y=10
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7y-5y=4\times 5
Multiply both sides by 5.
2y=4\times 5
Combine 7y and -5y to get 2y.
2y=20
Multiply 4 and 5 to get 20.
y=\frac{20}{2}
Divide both sides by 2.
y=10
Divide 20 by 2 to get 10.
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