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5-3y-4-\left(-2y\right)=y-8-\left(y-1\right)
To find the opposite of 4-2y, find the opposite of each term.
5-3y-4+2y=y-8-\left(y-1\right)
The opposite of -2y is 2y.
1-3y+2y=y-8-\left(y-1\right)
Subtract 4 from 5 to get 1.
1-y=y-8-\left(y-1\right)
Combine -3y and 2y to get -y.
1-y=y-8-y-\left(-1\right)
To find the opposite of y-1, find the opposite of each term.
1-y=y-8-y+1
The opposite of -1 is 1.
1-y=-8+1
Combine y and -y to get 0.
1-y=-7
Add -8 and 1 to get -7.
-y=-7-1
Subtract 1 from both sides.
-y=-8
Subtract 1 from -7 to get -8.
y=8
Multiply both sides by -1.