8x-3(4x+8)+9x+15=21

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Solution for 8x-3(4x+8)+9x+15=21 equation: 



8x-3(4x+8)+9x+15=21

We move all terms to the left:

8x-3(4x+8)+9x+15-(21)=0

We add all the numbers together, and all the variables

17x-3(4x+8)-6=0

We multiply parentheses

17x-12x-24-6=0

We add all the numbers together, and all the variables

5x-30=0

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

5x=30

x=30/5

x=6

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