5(a-1)=4(a+1)

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Solution for 5(a-1)=4(a+1) equation: 



5(a-1)=4(a+1)

We move all terms to the left:

5(a-1)-(4(a+1))=0

We multiply parentheses

5a-(4(a+1))-5=0



We calculate terms in parentheses: -(4(a+1)), so:

4(a+1)

We multiply parentheses

4a+4

Back to the equation:

-(4a+4)



We get rid of parentheses

5a-4a-4-5=0

We add all the numbers together, and all the variables

a-9=0

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

a=9

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