100-y=80-4x

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Solution for 100-y=80-4x equation:


Simplifying
100 + -1y = 80 + -4x

Solving
100 + -1y = 80 + -4x

Solving for variable 'y'.

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

Add '-100' to each side of the equation.
100 + -100 + -1y = 80 + -100 + -4x

Combine like terms: 100 + -100 = 0
0 + -1y = 80 + -100 + -4x
-1y = 80 + -100 + -4x

Combine like terms: 80 + -100 = -20
-1y = -20 + -4x

Divide each side by '-1'.
y = 20 + 4x

Simplifying
y = 20 + 4x

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