100-10x+(2-7x)=90-20x

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Solution for 100-10x+(2-7x)=90-20x equation:


Simplifying
100 + -10x + (2 + -7x) = 90 + -20x

Remove parenthesis around (2 + -7x)
100 + -10x + 2 + -7x = 90 + -20x

Reorder the terms:
100 + 2 + -10x + -7x = 90 + -20x

Combine like terms: 100 + 2 = 102
102 + -10x + -7x = 90 + -20x

Combine like terms: -10x + -7x = -17x
102 + -17x = 90 + -20x

Solving
102 + -17x = 90 + -20x

Solving for variable 'x'.

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

Add '20x' to each side of the equation.
102 + -17x + 20x = 90 + -20x + 20x

Combine like terms: -17x + 20x = 3x
102 + 3x = 90 + -20x + 20x

Combine like terms: -20x + 20x = 0
102 + 3x = 90 + 0
102 + 3x = 90

Add '-102' to each side of the equation.
102 + -102 + 3x = 90 + -102

Combine like terms: 102 + -102 = 0
0 + 3x = 90 + -102
3x = 90 + -102

Combine like terms: 90 + -102 = -12
3x = -12

Divide each side by '3'.
x = -4

Simplifying
x = -4

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