15=x+3x+7

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Solution for 15=x+3x+7 equation:


Simplifying
15 = x + 3x + 7

Reorder the terms:
15 = 7 + x + 3x

Combine like terms: x + 3x = 4x
15 = 7 + 4x

Solving
15 = 7 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
15 + -4x = 7 + 4x + -4x

Combine like terms: 4x + -4x = 0
15 + -4x = 7 + 0
15 + -4x = 7

Add '-15' to each side of the equation.
15 + -15 + -4x = 7 + -15

Combine like terms: 15 + -15 = 0
0 + -4x = 7 + -15
-4x = 7 + -15

Combine like terms: 7 + -15 = -8
-4x = -8

Divide each side by '-4'.
x = 2

Simplifying
x = 2

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