6a(2a-7)=12a^2-42a

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Solution for 6a(2a-7)=12a^2-42a equation: 



6a(2a-7)=12a^2-42a

We move all terms to the left:

6a(2a-7)-(12a^2-42a)=0

We multiply parentheses

12a^2-42a-(12a^2-42a)=0

We get rid of parentheses

12a^2-12a^2-42a+42a=0

We add all the numbers together, and all the variables

=0

a=0/1

a=0

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