(3x+1)+(x+3)=40

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Solution for (3x+1)+(x+3)=40 equation:


Simplifying
(3x + 1) + (x + 3) = 40

Reorder the terms:
(1 + 3x) + (x + 3) = 40

Remove parenthesis around (1 + 3x)
1 + 3x + (x + 3) = 40

Reorder the terms:
1 + 3x + (3 + x) = 40

Remove parenthesis around (3 + x)
1 + 3x + 3 + x = 40

Reorder the terms:
1 + 3 + 3x + x = 40

Combine like terms: 1 + 3 = 4
4 + 3x + x = 40

Combine like terms: 3x + x = 4x
4 + 4x = 40

Solving
4 + 4x = 40

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 4x = 40 + -4

Combine like terms: 4 + -4 = 0
0 + 4x = 40 + -4
4x = 40 + -4

Combine like terms: 40 + -4 = 36
4x = 36

Divide each side by '4'.
x = 9

Simplifying
x = 9

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