3(.4x+6.2)=21

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Solution for 3(.4x+6.2)=21 equation: 



3(.4x+6.2)=21

We move all terms to the left:

3(.4x+6.2)-(21)=0

We multiply parentheses

3x+18.6-21=0

We add all the numbers together, and all the variables

3x-2.4=0

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

3x=2.4

x=2.4/3

x=2.4/3

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