x+(x+84)=90

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Solution for x+(x+84)=90 equation:


Simplifying
x + (x + 84) = 90

Reorder the terms:
x + (84 + x) = 90

Remove parenthesis around (84 + x)
x + 84 + x = 90

Reorder the terms:
84 + x + x = 90

Combine like terms: x + x = 2x
84 + 2x = 90

Solving
84 + 2x = 90

Solving for variable 'x'.

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

Add '-84' to each side of the equation.
84 + -84 + 2x = 90 + -84

Combine like terms: 84 + -84 = 0
0 + 2x = 90 + -84
2x = 90 + -84

Combine like terms: 90 + -84 = 6
2x = 6

Divide each side by '2'.
x = 3

Simplifying
x = 3

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