70x+90=80x+120

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Solution for 70x+90=80x+120 equation:


Simplifying
70x + 90 = 80x + 120

Reorder the terms:
90 + 70x = 80x + 120

Reorder the terms:
90 + 70x = 120 + 80x

Solving
90 + 70x = 120 + 80x

Solving for variable 'x'.

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

Add '-80x' to each side of the equation.
90 + 70x + -80x = 120 + 80x + -80x

Combine like terms: 70x + -80x = -10x
90 + -10x = 120 + 80x + -80x

Combine like terms: 80x + -80x = 0
90 + -10x = 120 + 0
90 + -10x = 120

Add '-90' to each side of the equation.
90 + -90 + -10x = 120 + -90

Combine like terms: 90 + -90 = 0
0 + -10x = 120 + -90
-10x = 120 + -90

Combine like terms: 120 + -90 = 30
-10x = 30

Divide each side by '-10'.
x = -3

Simplifying
x = -3

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