9(x-1)=4x+21

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Solution for 9(x-1)=4x+21 equation: 



9(x-1)=4x+21

We move all terms to the left:

9(x-1)-(4x+21)=0

We multiply parentheses

9x-(4x+21)-9=0

We get rid of parentheses

9x-4x-21-9=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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