21x-13=14x+15

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Solution for 21x-13=14x+15 equation: 



21x-13=14x+15

We move all terms to the left:

21x-13-(14x+15)=0

We get rid of parentheses

21x-14x-15-13=0

We add all the numbers together, and all the variables

7x-28=0

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

7x=28

x=28/7

x=4

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