14+13a=20a-21

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Solution for 14+13a=20a-21 equation: 



14+13a=20a-21

We move all terms to the left:

14+13a-(20a-21)=0

We get rid of parentheses

13a-20a+21+14=0

We add all the numbers together, and all the variables

-7a+35=0

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

-7a=-35

a=-35/-7

a=+5

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