x+(x+15)+(x-20)=90

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Solution for x+(x+15)+(x-20)=90 equation: 


Simplifying
x + (x + 15) + (x + -20) = 90

Reorder the terms:
x + (15 + x) + (x + -20) = 90

Remove parenthesis around (15 + x)
x + 15 + x + (x + -20) = 90

Reorder the terms:
x + 15 + x + (-20 + x) = 90

Remove parenthesis around (-20 + x)
x + 15 + x + -20 + x = 90

Reorder the terms:
15 + -20 + x + x + x = 90

Combine like terms: 15 + -20 = -5
-5 + x + x + x = 90

Combine like terms: x + x = 2x
-5 + 2x + x = 90

Combine like terms: 2x + x = 3x
-5 + 3x = 90

Solving
-5 + 3x = 90

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 3x = 90 + 5

Combine like terms: -5 + 5 = 0
0 + 3x = 90 + 5
3x = 90 + 5

Combine like terms: 90 + 5 = 95
3x = 95

Divide each side by '3'.
x = 31.66666667

Simplifying
x = 31.66666667

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