a+130+(2a-40)=360

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Solution for a+130+(2a-40)=360 equation: 



a+130+(2a-40)=360

We move all terms to the left:

a+130+(2a-40)-(360)=0

We add all the numbers together, and all the variables

a+(2a-40)-230=0

We get rid of parentheses

a+2a-40-230=0

We add all the numbers together, and all the variables

3a-270=0

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

3a=270

a=270/3

a=90

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