x+5(3x)=21

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Solution for x+5(3x)=21 equation: 



x+5(3x)=21

We move all terms to the left:

x+5(3x)-(21)=0

We add all the numbers together, and all the variables

54x-21=0

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

54x=21

x=21/54

x=7/18

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