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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