10x-21x=13+8

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Solution for 10x-21x=13+8 equation: 



10x-21x=13+8

We move all terms to the left:

10x-21x-(13+8)=0

We add all the numbers together, and all the variables

10x-21x-21=0

We add all the numbers together, and all the variables

-11x-21=0

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

-11x=21

x=21/-11

x=-1+10/11

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