3x-20=-4x+57

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Solution for 3x-20=-4x+57 equation: 



3x-20=-4x+57

We move all terms to the left:

3x-20-(-4x+57)=0

We get rid of parentheses

3x+4x-57-20=0

We add all the numbers together, and all the variables

7x-77=0

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

7x=77

x=77/7

x=11

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