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-5\left(9-y\right)=-3\times 7\left(y-2\right)
Multiply both sides of the equation by 9, the least common multiple of 9,-3.
-45+5y=-3\times 7\left(y-2\right)
Use the distributive property to multiply -5 by 9-y.
-45+5y=-21\left(y-2\right)
Multiply -3 and 7 to get -21.
-45+5y=-21y+42
Use the distributive property to multiply -21 by y-2.
-45+5y+21y=42
Add 21y to both sides.
-45+26y=42
Combine 5y and 21y to get 26y.
26y=42+45
Add 45 to both sides.
26y=87
Add 42 and 45 to get 87.
y=\frac{87}{26}
Divide both sides by 26.