(3x+5)+(x+31)=90

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Solution for (3x+5)+(x+31)=90 equation:


Simplifying
(3x + 5) + (x + 31) = 90

Reorder the terms:
(5 + 3x) + (x + 31) = 90

Remove parenthesis around (5 + 3x)
5 + 3x + (x + 31) = 90

Reorder the terms:
5 + 3x + (31 + x) = 90

Remove parenthesis around (31 + x)
5 + 3x + 31 + x = 90

Reorder the terms:
5 + 31 + 3x + x = 90

Combine like terms: 5 + 31 = 36
36 + 3x + x = 90

Combine like terms: 3x + x = 4x
36 + 4x = 90

Solving
36 + 4x = 90

Solving for variable 'x'.

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

Add '-36' to each side of the equation.
36 + -36 + 4x = 90 + -36

Combine like terms: 36 + -36 = 0
0 + 4x = 90 + -36
4x = 90 + -36

Combine like terms: 90 + -36 = 54
4x = 54

Divide each side by '4'.
x = 13.5

Simplifying
x = 13.5

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