10(a-4)=30

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Solution for 10(a-4)=30 equation: 



10(a-4)=30

We move all terms to the left:

10(a-4)-(30)=0

We multiply parentheses

10a-40-30=0

We add all the numbers together, and all the variables

10a-70=0

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

10a=70

a=70/10

a=7

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