10x-3x=-21

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



10x-3x=-21

We move all terms to the left:

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

We add all the numbers together, and all the variables

7x+21=0

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

7x=-21

x=-21/7

x=-3

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