3.1x+4.2=2.1x-8.4

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Solution for 3.1x+4.2=2.1x-8.4 equation: 



3.1x+4.2=2.1x-8.4

We move all terms to the left:

3.1x+4.2-(2.1x-8.4)=0

We get rid of parentheses

3.1x-2.1x+8.4+4.2=0

We add all the numbers together, and all the variables

x+12.6=0

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

x=-12.6

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