20a-40=60

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Solution for 20a-40=60 equation: 



20a-40=60

We move all terms to the left:

20a-40-(60)=0

We add all the numbers together, and all the variables

20a-100=0

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

20a=100

a=100/20

a=5

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