(X+30)+(2X-20)=90

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Solution for (X+30)+(2X-20)=90 equation: 


Simplifying
(X + 30) + (2X + -20) = 90

Reorder the terms:
(30 + X) + (2X + -20) = 90

Remove parenthesis around (30 + X)
30 + X + (2X + -20) = 90

Reorder the terms:
30 + X + (-20 + 2X) = 90

Remove parenthesis around (-20 + 2X)
30 + X + -20 + 2X = 90

Reorder the terms:
30 + -20 + X + 2X = 90

Combine like terms: 30 + -20 = 10
10 + X + 2X = 90

Combine like terms: X + 2X = 3X
10 + 3X = 90

Solving
10 + 3X = 90

Solving for variable 'X'.

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

Add '-10' to each side of the equation.
10 + -10 + 3X = 90 + -10

Combine like terms: 10 + -10 = 0
0 + 3X = 90 + -10
3X = 90 + -10

Combine like terms: 90 + -10 = 80
3X = 80

Divide each side by '3'.
X = 26.66666667

Simplifying
X = 26.66666667

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