100=200-(20-x)2

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Solution for 100=200-(20-x)2 equation:


Simplifying
100 = 200 + -1(20 + -1x) * 2

Reorder the terms for easier multiplication:
100 = 200 + -1 * 2(20 + -1x)

Multiply -1 * 2
100 = 200 + -2(20 + -1x)
100 = 200 + (20 * -2 + -1x * -2)
100 = 200 + (-40 + 2x)

Combine like terms: 200 + -40 = 160
100 = 160 + 2x

Solving
100 = 160 + 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 = 160 + 2x + -2x

Combine like terms: 2x + -2x = 0
100 + -2x = 160 + 0
100 + -2x = 160

Add '-100' to each side of the equation.
100 + -100 + -2x = 160 + -100

Combine like terms: 100 + -100 = 0
0 + -2x = 160 + -100
-2x = 160 + -100

Combine like terms: 160 + -100 = 60
-2x = 60

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

Simplifying
x = -30

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