100-20=4x

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Solution for 100-20=4x equation:


Simplifying
100 + -20 = 4x

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

Solving
80 = 4x

Solving for variable 'x'.

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

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

Combine like terms: 4x + -4x = 0
80 + -4x = 0

Add '-80' to each side of the equation.
80 + -80 + -4x = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -4x = 0 + -80
-4x = 0 + -80

Combine like terms: 0 + -80 = -80
-4x = -80

Divide each side by '-4'.
x = 20

Simplifying
x = 20

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