120+.80x=70+.90x

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


Simplifying
120 + 0.80x = 70 + 0.90x

Solving
120 + 0.80x = 70 + 0.90x

Solving for variable 'x'.

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

Add '-0.90x' to each side of the equation.
120 + 0.80x + -0.90x = 70 + 0.90x + -0.90x

Combine like terms: 0.80x + -0.90x = -0.1x
120 + -0.1x = 70 + 0.90x + -0.90x

Combine like terms: 0.90x + -0.90x = 0.00
120 + -0.1x = 70 + 0.00
120 + -0.1x = 70

Add '-120' to each side of the equation.
120 + -120 + -0.1x = 70 + -120

Combine like terms: 120 + -120 = 0
0 + -0.1x = 70 + -120
-0.1x = 70 + -120

Combine like terms: 70 + -120 = -50
-0.1x = -50

Divide each side by '-0.1'.
x = 500

Simplifying
x = 500

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