x+(3x+12)=90

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


Simplifying
x + (3x + 12) = 90

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

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

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

Combine like terms: x + 3x = 4x
12 + 4x = 90

Solving
12 + 4x = 90

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 4x = 90 + -12

Combine like terms: 12 + -12 = 0
0 + 4x = 90 + -12
4x = 90 + -12

Combine like terms: 90 + -12 = 78
4x = 78

Divide each side by '4'.
x = 19.5

Simplifying
x = 19.5

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