5a+10(a+9)=180

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Solution for 5a+10(a+9)=180 equation: 



5a+10(a+9)=180

We move all terms to the left:

5a+10(a+9)-(180)=0

We multiply parentheses

5a+10a+90-180=0

We add all the numbers together, and all the variables

15a-90=0

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

15a=90

a=90/15

a=6

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