10x-(-21)=-8x

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Solution for 10x-(-21)=-8x equation: 



10x-(-21)=-8x

We move all terms to the left:

10x-(-21)-(-8x)=0

We add all the numbers together, and all the variables

10x-(-8x)+21=0

We get rid of parentheses

10x+8x+21=0

We add all the numbers together, and all the variables

18x+21=0

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

18x=-21

x=-21/18

x=-1+1/6

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