70-x-x-2x=90

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Solution for 70-x-x-2x=90 equation:


Simplifying
70 + -1x + -1x + -2x = 90

Combine like terms: -1x + -1x = -2x
70 + -2x + -2x = 90

Combine like terms: -2x + -2x = -4x
70 + -4x = 90

Solving
70 + -4x = 90

Solving for variable 'x'.

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

Add '-70' to each side of the equation.
70 + -70 + -4x = 90 + -70

Combine like terms: 70 + -70 = 0
0 + -4x = 90 + -70
-4x = 90 + -70

Combine like terms: 90 + -70 = 20
-4x = 20

Divide each side by '-4'.
x = -5

Simplifying
x = -5

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