10x-15=-8x-21

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Solution for 10x-15=-8x-21 equation: 



10x-15=-8x-21

We move all terms to the left:

10x-15-(-8x-21)=0

We get rid of parentheses

10x+8x+21-15=0

We add all the numbers together, and all the variables

18x+6=0

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

18x=-6

x=-6/18

x=-1/3

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