13-8(5x-9)=21

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Solution for 13-8(5x-9)=21 equation: 



13-8(5x-9)=21

We move all terms to the left:

13-8(5x-9)-(21)=0

We add all the numbers together, and all the variables

-8(5x-9)-8=0

We multiply parentheses

-40x+72-8=0

We add all the numbers together, and all the variables

-40x+64=0

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

-40x=-64

x=-64/-40

x=1+3/5

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