7(3x+1)-4=87

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Solution for 7(3x+1)-4=87 equation: 



7(3x+1)-4=87

We move all terms to the left:

7(3x+1)-4-(87)=0

We add all the numbers together, and all the variables

7(3x+1)-91=0

We multiply parentheses

21x+7-91=0

We add all the numbers together, and all the variables

21x-84=0

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

21x=84

x=84/21

x=4

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