x-2(x-3)=21

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Solution for x-2(x-3)=21 equation: 



x-2(x-3)=21

We move all terms to the left:

x-2(x-3)-(21)=0

We multiply parentheses

x-2x+6-21=0

We add all the numbers together, and all the variables

-1x-15=0

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

-x=15

x=15/-1

x=-15

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