2a+(10+a)=90

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Solution for 2a+(10+a)=90 equation: 



2a+(10+a)=90

We move all terms to the left:

2a+(10+a)-(90)=0

We add all the numbers together, and all the variables

2a+(a+10)-90=0

We get rid of parentheses

2a+a+10-90=0

We add all the numbers together, and all the variables

3a-80=0

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

3a=80

a=80/3

a=26+2/3

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