12+5x+4x-3=45

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Solution for 12+5x+4x-3=45 equation: 



12+5x+4x-3=45

We move all terms to the left:

12+5x+4x-3-(45)=0

We add all the numbers together, and all the variables

9x-36=0

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

9x=36

x=36/9

x=4

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