-10(y-4)=20

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Solution for -10(y-4)=20 equation: 


Simplifying
-10(y + -4) = 20

Reorder the terms:
-10(-4 + y) = 20
(-4 * -10 + y * -10) = 20
(40 + -10y) = 20

Solving
40 + -10y = 20

Solving for variable 'y'.

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

Add '-40' to each side of the equation.
40 + -40 + -10y = 20 + -40

Combine like terms: 40 + -40 = 0
0 + -10y = 20 + -40
-10y = 20 + -40

Combine like terms: 20 + -40 = -20
-10y = -20

Divide each side by '-10'.
y = 2

Simplifying
y = 2

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