3a+400=7a+160

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Solution for 3a+400=7a+160 equation: 



3a+400=7a+160

We move all terms to the left:

3a+400-(7a+160)=0

We get rid of parentheses

3a-7a-160+400=0

We add all the numbers together, and all the variables

-4a+240=0

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

-4a=-240

a=-240/-4

a=+60

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