3(7+x)=18

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Solution for 3(7+x)=18 equation: 



3(7+x)=18

We move all terms to the left:

3(7+x)-(18)=0

We add all the numbers together, and all the variables

3(x+7)-18=0

We multiply parentheses

3x+21-18=0

We add all the numbers together, and all the variables

3x+3=0

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

3x=-3

x=-3/3

x=-1

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