100x+30=120x+90

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Solution for 100x+30=120x+90 equation:


Simplifying
100x + 30 = 120x + 90

Reorder the terms:
30 + 100x = 120x + 90

Reorder the terms:
30 + 100x = 90 + 120x

Solving
30 + 100x = 90 + 120x

Solving for variable 'x'.

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

Add '-120x' to each side of the equation.
30 + 100x + -120x = 90 + 120x + -120x

Combine like terms: 100x + -120x = -20x
30 + -20x = 90 + 120x + -120x

Combine like terms: 120x + -120x = 0
30 + -20x = 90 + 0
30 + -20x = 90

Add '-30' to each side of the equation.
30 + -30 + -20x = 90 + -30

Combine like terms: 30 + -30 = 0
0 + -20x = 90 + -30
-20x = 90 + -30

Combine like terms: 90 + -30 = 60
-20x = 60

Divide each side by '-20'.
x = -3

Simplifying
x = -3

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