3+21=-10x+9

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Solution for 3+21=-10x+9 equation: 



3+21=-10x+9

We move all terms to the left:

3+21-(-10x+9)=0

We add all the numbers together, and all the variables

-(-10x+9)+24=0

We get rid of parentheses

10x-9+24=0

We add all the numbers together, and all the variables

10x+15=0

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

10x=-15

x=-15/10

x=-1+1/2

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