-5.1x+7.2x=8.4

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Solution for -5.1x+7.2x=8.4 equation: 



-5.1x+7.2x=8.4

We move all terms to the left:

-5.1x+7.2x-(8.4)=0

We add all the numbers together, and all the variables

2.1x-8.4=0

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

2.1x=8.4

x=8.4/2.1

x=4

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