21(5-a)+5a=137

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Solution for 21(5-a)+5a=137 equation: 



21(5-a)+5a=137

We move all terms to the left:

21(5-a)+5a-(137)=0

We add all the numbers together, and all the variables

21(-1a+5)+5a-137=0

We add all the numbers together, and all the variables

5a+21(-1a+5)-137=0

We multiply parentheses

5a-21a+105-137=0

We add all the numbers together, and all the variables

-16a-32=0

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

-16a=32

a=32/-16

a=-2

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