(5a-45)+3a=180

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Solution for (5a-45)+3a=180 equation: 



(5a-45)+3a=180

We move all terms to the left:

(5a-45)+3a-(180)=0

We add all the numbers together, and all the variables

3a+(5a-45)-180=0

We get rid of parentheses

3a+5a-45-180=0

We add all the numbers together, and all the variables

8a-225=0

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

8a=225

a=225/8

a=28+1/8

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