4(-1+0.5y)=20

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Solution for 4(-1+0.5y)=20 equation: 


Simplifying
4(-1 + 0.5y) = 20
(-1 * 4 + 0.5y * 4) = 20
(-4 + 2y) = 20

Solving
-4 + 2y = 20

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '4' to each side of the equation.
-4 + 4 + 2y = 20 + 4

Combine like terms: -4 + 4 = 0
0 + 2y = 20 + 4
2y = 20 + 4

Combine like terms: 20 + 4 = 24
2y = 24

Divide each side by '2'.
y = 12

Simplifying
y = 12

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