what is 2(a-10)=6a

what is 2(a-10)=6a

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I think there's a slight error, here.

We have

2a -20 = 6a    subtract 2a from both sides

-20 = 4a         divide by 4 on both sides

-5 = a      or      a = -5

2a-20=6a

4a=20

the answer is a=5