2x-4(x-20)=100

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Solution for 2x-4(x-20)=100 equation: 


Simplifying
2x + -4(x + -20) = 100

Reorder the terms:
2x + -4(-20 + x) = 100
2x + (-20 * -4 + x * -4) = 100
2x + (80 + -4x) = 100

Reorder the terms:
80 + 2x + -4x = 100

Combine like terms: 2x + -4x = -2x
80 + -2x = 100

Solving
80 + -2x = 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 + -2x = 100 + -80

Combine like terms: 80 + -80 = 0
0 + -2x = 100 + -80
-2x = 100 + -80

Combine like terms: 100 + -80 = 20
-2x = 20

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

Simplifying
x = -10

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