5(3x-7)=-5(x-21)

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Solution for 5(3x-7)=-5(x-21) equation: 



5(3x-7)=-5(x-21)

We move all terms to the left:

5(3x-7)-(-5(x-21))=0

We multiply parentheses

15x-(-5(x-21))-35=0



We calculate terms in parentheses: -(-5(x-21)), so:

-5(x-21)

We multiply parentheses

-5x+105

Back to the equation:

-(-5x+105)



We get rid of parentheses

15x+5x-105-35=0

We add all the numbers together, and all the variables

20x-140=0

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

20x=140

x=140/20

x=7

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