90=x+(x+38)+(x+13)

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Solution for 90=x+(x+38)+(x+13) equation: 


Simplifying
90 = x + (x + 38) + (x + 13)

Reorder the terms:
90 = x + (38 + x) + (x + 13)

Remove parenthesis around (38 + x)
90 = x + 38 + x + (x + 13)

Reorder the terms:
90 = x + 38 + x + (13 + x)

Remove parenthesis around (13 + x)
90 = x + 38 + x + 13 + x

Reorder the terms:
90 = 38 + 13 + x + x + x

Combine like terms: 38 + 13 = 51
90 = 51 + x + x + x

Combine like terms: x + x = 2x
90 = 51 + 2x + x

Combine like terms: 2x + x = 3x
90 = 51 + 3x

Solving
90 = 51 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
90 + -3x = 51 + 3x + -3x

Combine like terms: 3x + -3x = 0
90 + -3x = 51 + 0
90 + -3x = 51

Add '-90' to each side of the equation.
90 + -90 + -3x = 51 + -90

Combine like terms: 90 + -90 = 0
0 + -3x = 51 + -90
-3x = 51 + -90

Combine like terms: 51 + -90 = -39
-3x = -39

Divide each side by '-3'.
x = 13

Simplifying
x = 13

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