4x+3+5x=8x+12

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Solution for 4x+3+5x=8x+12 equation: 



4x+3+5x=8x+12

We move all terms to the left:

4x+3+5x-(8x+12)=0

We add all the numbers together, and all the variables

9x-(8x+12)+3=0

We get rid of parentheses

9x-8x-12+3=0

We add all the numbers together, and all the variables

x-9=0

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

x=9

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