120+120+120+x=90

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Solution for 120+120+120+x=90 equation:


Simplifying
120 + 120 + 120 + x = 90

Combine like terms: 120 + 120 = 240
240 + 120 + x = 90

Combine like terms: 240 + 120 = 360
360 + x = 90

Solving
360 + x = 90

Solving for variable 'x'.

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

Add '-360' to each side of the equation.
360 + -360 + x = 90 + -360

Combine like terms: 360 + -360 = 0
0 + x = 90 + -360
x = 90 + -360

Combine like terms: 90 + -360 = -270
x = -270

Simplifying
x = -270

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