12x+3x+45=180

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Solution for 12x+3x+45=180 equation: 



12x+3x+45=180

We move all terms to the left:

12x+3x+45-(180)=0

We add all the numbers together, and all the variables

15x-135=0

We move all terms containing x to the left, all other terms to the right

15x=135

x=135/15

x=9

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