x+(x+30)=90

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


Simplifying
x + (x + 30) = 90

Reorder the terms:
x + (30 + x) = 90

Remove parenthesis around (30 + x)
x + 30 + x = 90

Reorder the terms:
30 + x + x = 90

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

Solving
30 + 2x = 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 + 2x = 90 + -30

Combine like terms: 30 + -30 = 0
0 + 2x = 90 + -30
2x = 90 + -30

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

Divide each side by '2'.
x = 30

Simplifying
x = 30

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