5x+8x-84=42-8x

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Solution for 5x+8x-84=42-8x equation: 



5x+8x-84=42-8x

We move all terms to the left:

5x+8x-84-(42-8x)=0

We add all the numbers together, and all the variables

5x+8x-(-8x+42)-84=0

We add all the numbers together, and all the variables

13x-(-8x+42)-84=0

We get rid of parentheses

13x+8x-42-84=0

We add all the numbers together, and all the variables

21x-126=0

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

21x=126

x=126/21

x=6

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