0.3a+(0.2a-0.5)+0.2(a+2)=13

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Solution for 0.3a+(0.2a-0.5)+0.2(a+2)=13 equation: 



0.3a+(0.2a-0.5)+0.2(a+2)=13

We move all terms to the left:

0.3a+(0.2a-0.5)+0.2(a+2)-(13)=0

We multiply parentheses

0.3a+(0.2a-0.5)+0.2a+0.4-13=0

We get rid of parentheses

0.3a+0.2a+0.2a-0.5+0.4-13=0

We add all the numbers together, and all the variables

0.7a-13.1=0

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

0.7a=13.1

a=13.1/0.7

a=18+0.5/0.7

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