3x-15+3x-15=12

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


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

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

Combine like terms: -15 + -15 = -30
-30 + 3x + 3x = 12

Combine like terms: 3x + 3x = 6x
-30 + 6x = 12

Solving
-30 + 6x = 12

Solving for variable 'x'.

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

Add '30' to each side of the equation.
-30 + 30 + 6x = 12 + 30

Combine like terms: -30 + 30 = 0
0 + 6x = 12 + 30
6x = 12 + 30

Combine like terms: 12 + 30 = 42
6x = 42

Divide each side by '6'.
x = 7

Simplifying
x = 7

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