-15=x-3-4x

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Solution for -15=x-3-4x equation:


Simplifying
-15 = x + -3 + -4x

Reorder the terms:
-15 = -3 + x + -4x

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

Solving
-15 = -3 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
-15 + 3x = -3 + -3x + 3x

Combine like terms: -3x + 3x = 0
-15 + 3x = -3 + 0
-15 + 3x = -3

Add '15' to each side of the equation.
-15 + 15 + 3x = -3 + 15

Combine like terms: -15 + 15 = 0
0 + 3x = -3 + 15
3x = -3 + 15

Combine like terms: -3 + 15 = 12
3x = 12

Divide each side by '3'.
x = 4

Simplifying
x = 4

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