3x+12=4x-y

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Solution for 3x+12=4x-y equation:


Simplifying
3x + 12 = 4x + -1y

Reorder the terms:
12 + 3x = 4x + -1y

Solving
12 + 3x = 4x + -1y

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.
12 + 3x + -4x = 4x + -4x + -1y

Combine like terms: 3x + -4x = -1x
12 + -1x = 4x + -4x + -1y

Combine like terms: 4x + -4x = 0
12 + -1x = 0 + -1y
12 + -1x = -1y

Add '-12' to each side of the equation.
12 + -12 + -1x = -12 + -1y

Combine like terms: 12 + -12 = 0
0 + -1x = -12 + -1y
-1x = -12 + -1y

Divide each side by '-1'.
x = 12 + y

Simplifying
x = 12 + y

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