5x-7x+3=-21

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Solution for 5x-7x+3=-21 equation: 



5x-7x+3=-21

We move all terms to the left:

5x-7x+3-(-21)=0

We add all the numbers together, and all the variables

-2x+24=0

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

-2x=-24

x=-24/-2

x=+12

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