3(7x-19)=90

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Solution for 3(7x-19)=90 equation: 



3(7x-19)=90

We move all terms to the left:

3(7x-19)-(90)=0

We multiply parentheses

21x-57-90=0

We add all the numbers together, and all the variables

21x-147=0

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

21x=147

x=147/21

x=7

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