x+2x+x-30=90

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


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

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

Combine like terms: x + 2x = 3x
-30 + 3x + x = 90

Combine like terms: 3x + x = 4x
-30 + 4x = 90

Solving
-30 + 4x = 90

Solving for variable 'x'.

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

Add '30' to each side of the equation.
-30 + 30 + 4x = 90 + 30

Combine like terms: -30 + 30 = 0
0 + 4x = 90 + 30
4x = 90 + 30

Combine like terms: 90 + 30 = 120
4x = 120

Divide each side by '4'.
x = 30

Simplifying
x = 30

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