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12-\left(4-2\left(y+1\right)\right)=4y+12
Multiply both sides of the equation by 2.
12-\left(4-2y-2\right)=4y+12
Use the distributive property to multiply -2 by y+1.
12-\left(2-2y\right)=4y+12
Subtract 2 from 4 to get 2.
12-2-\left(-2y\right)=4y+12
To find the opposite of 2-2y, find the opposite of each term.
12-2+2y=4y+12
The opposite of -2y is 2y.
10+2y=4y+12
Subtract 2 from 12 to get 10.
10+2y-4y=12
Subtract 4y from both sides.
10-2y=12
Combine 2y and -4y to get -2y.
-2y=12-10
Subtract 10 from both sides.
-2y=2
Subtract 10 from 12 to get 2.
y=\frac{2}{-2}
Divide both sides by -2.
y=-1
Divide 2 by -2 to get -1.