3a+17-a=15a-20a+31-4

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Solution for 3a+17-a=15a-20a+31-4 equation: 



3a+17-a=15a-20a+31-4

We move all terms to the left:

3a+17-a-(15a-20a+31-4)=0

We add all the numbers together, and all the variables

3a-a-(-5a+27)+17=0

We add all the numbers together, and all the variables

2a-(-5a+27)+17=0

We get rid of parentheses

2a+5a-27+17=0

We add all the numbers together, and all the variables

7a-10=0

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

7a=10

a=10/7

a=1+3/7

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