7x-15=x-3x

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


Simplifying
7x + -15 = x + -3x

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

Combine like terms: x + -3x = -2x
-15 + 7x = -2x

Solving
-15 + 7x = -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
-15 + 7x + 2x = -2x + 2x

Combine like terms: 7x + 2x = 9x
-15 + 9x = -2x + 2x

Combine like terms: -2x + 2x = 0
-15 + 9x = 0

Add '15' to each side of the equation.
-15 + 15 + 9x = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 9x = 0 + 15
9x = 0 + 15

Combine like terms: 0 + 15 = 15
9x = 15

Divide each side by '9'.
x = 1.666666667

Simplifying
x = 1.666666667

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