4(20+x)=100

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Solution for 4(20+x)=100 equation: 


Simplifying
4(20 + x) = 100
(20 * 4 + x * 4) = 100
(80 + 4x) = 100

Solving
80 + 4x = 100

Solving for variable 'x'.

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

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

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

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

Divide each side by '4'.
x = 5

Simplifying
x = 5

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