4x+6.4=21

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Solution for 4x+6.4=21 equation: 



4x+6.4=21

We move all terms to the left:

4x+6.4-(21)=0

We add all the numbers together, and all the variables

4x-14.6=0

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

4x=14.6

x=14.6/4

x=3+1/1.53846153846

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