5(a-5)=-4(a-5)

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



5(a-5)=-4(a-5)

We move all terms to the left:

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

We multiply parentheses

5a-(-4(a-5))-25=0



We calculate terms in parentheses: -(-4(a-5)), so:

-4(a-5)

We multiply parentheses

-4a+20

Back to the equation:

-(-4a+20)



We get rid of parentheses

5a+4a-20-25=0

We add all the numbers together, and all the variables

9a-45=0

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

9a=45

a=45/9

a=5

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