100=10+20+15+10+x-20+x-20+x-20

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Solution for 100=10+20+15+10+x-20+x-20+x-20 equation:


Simplifying
100 = 10 + 20 + 15 + 10 + x + -20 + x + -20 + x + -20

Reorder the terms:
100 = 10 + 20 + 15 + 10 + -20 + -20 + -20 + x + x + x

Combine like terms: 10 + 20 = 30
100 = 30 + 15 + 10 + -20 + -20 + -20 + x + x + x

Combine like terms: 30 + 15 = 45
100 = 45 + 10 + -20 + -20 + -20 + x + x + x

Combine like terms: 45 + 10 = 55
100 = 55 + -20 + -20 + -20 + x + x + x

Combine like terms: 55 + -20 = 35
100 = 35 + -20 + -20 + x + x + x

Combine like terms: 35 + -20 = 15
100 = 15 + -20 + x + x + x

Combine like terms: 15 + -20 = -5
100 = -5 + x + x + x

Combine like terms: x + x = 2x
100 = -5 + 2x + x

Combine like terms: 2x + x = 3x
100 = -5 + 3x

Solving
100 = -5 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
100 + -3x = -5 + 3x + -3x

Combine like terms: 3x + -3x = 0
100 + -3x = -5 + 0
100 + -3x = -5

Add '-100' to each side of the equation.
100 + -100 + -3x = -5 + -100

Combine like terms: 100 + -100 = 0
0 + -3x = -5 + -100
-3x = -5 + -100

Combine like terms: -5 + -100 = -105
-3x = -105

Divide each side by '-3'.
x = 35

Simplifying
x = 35

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