12=3x+2*15x-3x

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Solution for 12=3x+2*15x-3x equation:


Simplifying
12 = 3x + 2 * 15x + -3x

Multiply 2 * 15
12 = 3x + 30x + -3x

Combine like terms: 3x + 30x = 33x
12 = 33x + -3x

Combine like terms: 33x + -3x = 30x
12 = 30x

Solving
12 = 30x

Solving for variable 'x'.

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

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

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

Add '-12' to each side of the equation.
12 + -12 + -30x = 0 + -12

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

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

Divide each side by '-30'.
x = 0.4

Simplifying
x = 0.4

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