-3(a-10)=7a

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Solution for -3(a-10)=7a equation: 



-3(a-10)=7a

We move all terms to the left:

-3(a-10)-(7a)=0

We add all the numbers together, and all the variables

-7a-3(a-10)=0

We multiply parentheses

-7a-3a+30=0

We add all the numbers together, and all the variables

-10a+30=0

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

-10a=-30

a=-30/-10

a=+3

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