100=40-2x

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Solution for 100=40-2x equation:


Simplifying
100 = 40 + -2x

Solving
100 = 40 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
100 + 2x = 40 + -2x + 2x

Combine like terms: -2x + 2x = 0
100 + 2x = 40 + 0
100 + 2x = 40

Add '-100' to each side of the equation.
100 + -100 + 2x = 40 + -100

Combine like terms: 100 + -100 = 0
0 + 2x = 40 + -100
2x = 40 + -100

Combine like terms: 40 + -100 = -60
2x = -60

Divide each side by '2'.
x = -30

Simplifying
x = -30

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