x+7+3x=9

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Solution for x+7+3x=9 equation: 


Simplifying
x + 7 + 3x = 9

Reorder the terms:
7 + x + 3x = 9

Combine like terms: x + 3x = 4x
7 + 4x = 9

Solving
7 + 4x = 9

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + -7 + 4x = 9 + -7

Combine like terms: 7 + -7 = 0
0 + 4x = 9 + -7
4x = 9 + -7

Combine like terms: 9 + -7 = 2
4x = 2

Divide each side by '4'.
x = 0.5

Simplifying
x = 0.5

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