(7+0x)*3=21

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Solution for (7+0x)*3=21 equation: 



(7+0x)*3=21

We move all terms to the left:

(7+0x)*3-(21)=0

We add all the numbers together, and all the variables

(x+7)*3-21=0

We multiply parentheses

3x+21-21=0

We add all the numbers together, and all the variables

3x=0

x=0/3

x=0

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