(2x+12)+(2x+21)=90

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Solution for (2x+12)+(2x+21)=90 equation:


Simplifying
(2x + 12) + (2x + 21) = 90

Reorder the terms:
(12 + 2x) + (2x + 21) = 90

Remove parenthesis around (12 + 2x)
12 + 2x + (2x + 21) = 90

Reorder the terms:
12 + 2x + (21 + 2x) = 90

Remove parenthesis around (21 + 2x)
12 + 2x + 21 + 2x = 90

Reorder the terms:
12 + 21 + 2x + 2x = 90

Combine like terms: 12 + 21 = 33
33 + 2x + 2x = 90

Combine like terms: 2x + 2x = 4x
33 + 4x = 90

Solving
33 + 4x = 90

Solving for variable 'x'.

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

Add '-33' to each side of the equation.
33 + -33 + 4x = 90 + -33

Combine like terms: 33 + -33 = 0
0 + 4x = 90 + -33
4x = 90 + -33

Combine like terms: 90 + -33 = 57
4x = 57

Divide each side by '4'.
x = 14.25

Simplifying
x = 14.25

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