5x+8x=12+7x

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Solution for 5x+8x=12+7x equation: 



5x+8x=12+7x

We move all terms to the left:

5x+8x-(12+7x)=0

We add all the numbers together, and all the variables

5x+8x-(7x+12)=0

We add all the numbers together, and all the variables

13x-(7x+12)=0

We get rid of parentheses

13x-7x-12=0

We add all the numbers together, and all the variables

6x-12=0

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

6x=12

x=12/6

x=2

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