4-y=0.5(y+20)

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


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

Reorder the terms:
4 + -1y = 0.5(20 + y)
4 + -1y = (20 * 0.5 + y * 0.5)
4 + -1y = (10 + 0.5y)

Solving
4 + -1y = 10 + 0.5y

Solving for variable 'y'.

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

Add '-0.5y' to each side of the equation.
4 + -1y + -0.5y = 10 + 0.5y + -0.5y

Combine like terms: -1y + -0.5y = -1.5y
4 + -1.5y = 10 + 0.5y + -0.5y

Combine like terms: 0.5y + -0.5y = 0.0
4 + -1.5y = 10 + 0.0
4 + -1.5y = 10

Add '-4' to each side of the equation.
4 + -4 + -1.5y = 10 + -4

Combine like terms: 4 + -4 = 0
0 + -1.5y = 10 + -4
-1.5y = 10 + -4

Combine like terms: 10 + -4 = 6
-1.5y = 6

Divide each side by '-1.5'.
y = -4

Simplifying
y = -4

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