(3x-10)+(x+12)=90

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Solution for (3x-10)+(x+12)=90 equation:


Simplifying
(3x + -10) + (x + 12) = 90

Reorder the terms:
(-10 + 3x) + (x + 12) = 90

Remove parenthesis around (-10 + 3x)
-10 + 3x + (x + 12) = 90

Reorder the terms:
-10 + 3x + (12 + x) = 90

Remove parenthesis around (12 + x)
-10 + 3x + 12 + x = 90

Reorder the terms:
-10 + 12 + 3x + x = 90

Combine like terms: -10 + 12 = 2
2 + 3x + x = 90

Combine like terms: 3x + x = 4x
2 + 4x = 90

Solving
2 + 4x = 90

Solving for variable 'x'.

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

Add '-2' to each side of the equation.
2 + -2 + 4x = 90 + -2

Combine like terms: 2 + -2 = 0
0 + 4x = 90 + -2
4x = 90 + -2

Combine like terms: 90 + -2 = 88
4x = 88

Divide each side by '4'.
x = 22

Simplifying
x = 22

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