2x-30+x-30=90

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Solution for 2x-30+x-30=90 equation: 


Simplifying
2x + -30 + x + -30 = 90

Reorder the terms:
-30 + -30 + 2x + x = 90

Combine like terms: -30 + -30 = -60
-60 + 2x + x = 90

Combine like terms: 2x + x = 3x
-60 + 3x = 90

Solving
-60 + 3x = 90

Solving for variable 'x'.

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

Add '60' to each side of the equation.
-60 + 60 + 3x = 90 + 60

Combine like terms: -60 + 60 = 0
0 + 3x = 90 + 60
3x = 90 + 60

Combine like terms: 90 + 60 = 150
3x = 150

Divide each side by '3'.
x = 50

Simplifying
x = 50

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