(x+5)*7=21

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Solution for (x+5)*7=21 equation: 



(x+5)*7=21

We move all terms to the left:

(x+5)*7-(21)=0

We multiply parentheses

7x+35-21=0

We add all the numbers together, and all the variables

7x+14=0

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

7x=-14

x=-14/7

x=-2

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