3x-7=42-4x

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Solution for 3x-7=42-4x equation: 



3x-7=42-4x

We move all terms to the left:

3x-7-(42-4x)=0

We add all the numbers together, and all the variables

3x-(-4x+42)-7=0

We get rid of parentheses

3x+4x-42-7=0

We add all the numbers together, and all the variables

7x-49=0

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

7x=49

x=49/7

x=7

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