3x-12=4x-15

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Solution for 3x-12=4x-15 equation:


Simplifying
3x + -12 = 4x + -15

Reorder the terms:
-12 + 3x = 4x + -15

Reorder the terms:
-12 + 3x = -15 + 4x

Solving
-12 + 3x = -15 + 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.
-12 + 3x + -4x = -15 + 4x + -4x

Combine like terms: 3x + -4x = -1x
-12 + -1x = -15 + 4x + -4x

Combine like terms: 4x + -4x = 0
-12 + -1x = -15 + 0
-12 + -1x = -15

Add '12' to each side of the equation.
-12 + 12 + -1x = -15 + 12

Combine like terms: -12 + 12 = 0
0 + -1x = -15 + 12
-1x = -15 + 12

Combine like terms: -15 + 12 = -3
-1x = -3

Divide each side by '-1'.
x = 3

Simplifying
x = 3

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