5x-9=-21-10x

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Solution for 5x-9=-21-10x equation: 



5x-9=-21-10x

We move all terms to the left:

5x-9-(-21-10x)=0

We add all the numbers together, and all the variables

5x-(-10x-21)-9=0

We get rid of parentheses

5x+10x+21-9=0

We add all the numbers together, and all the variables

15x+12=0

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

15x=-12

x=-12/15

x=-4/5

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