20=5(3-x)=100

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Solution for 20=5(3-x)=100 equation: 



20=5(3-x)=100

We move all terms to the left:

20-(5(3-x))=0

We add all the numbers together, and all the variables

-(5(-1x+3))+20=0



We calculate terms in parentheses: -(5(-1x+3)), so:

5(-1x+3)

We multiply parentheses

-5x+15

Back to the equation:

-(-5x+15)



We get rid of parentheses

5x-15+20=0

We add all the numbers together, and all the variables

5x+5=0

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

5x=-5

x=-5/5

x=-1

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