2x+(x+30)=90-x

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


Simplifying
2x + (x + 30) = 90 + -1x

Reorder the terms:
2x + (30 + x) = 90 + -1x

Remove parenthesis around (30 + x)
2x + 30 + x = 90 + -1x

Reorder the terms:
30 + 2x + x = 90 + -1x

Combine like terms: 2x + x = 3x
30 + 3x = 90 + -1x

Solving
30 + 3x = 90 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
30 + 3x + x = 90 + -1x + x

Combine like terms: 3x + x = 4x
30 + 4x = 90 + -1x + x

Combine like terms: -1x + x = 0
30 + 4x = 90 + 0
30 + 4x = 90

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 = 60
4x = 60

Divide each side by '4'.
x = 15

Simplifying
x = 15

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