7a+3(240-a)=1360

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Solution for 7a+3(240-a)=1360 equation: 



7a+3(240-a)=1360

We move all terms to the left:

7a+3(240-a)-(1360)=0

We add all the numbers together, and all the variables

7a+3(-1a+240)-1360=0

We multiply parentheses

7a-3a+720-1360=0

We add all the numbers together, and all the variables

4a-640=0

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

4a=640

a=640/4

a=160

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