12+3x-5=40

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Solution for 12+3x-5=40 equation: 



12+3x-5=40

We move all terms to the left:

12+3x-5-(40)=0

We add all the numbers together, and all the variables

3x-33=0

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

3x=33

x=33/3

x=11

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