7(3+x)=126

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Solution for 7(3+x)=126 equation: 



7(3+x)=126

We move all terms to the left:

7(3+x)-(126)=0

We add all the numbers together, and all the variables

7(x+3)-126=0

We multiply parentheses

7x+21-126=0

We add all the numbers together, and all the variables

7x-105=0

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

7x=105

x=105/7

x=15

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