4(1-5a)-8(1+2a)=-40

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Solution for 4(1-5a)-8(1+2a)=-40 equation: 



4(1-5a)-8(1+2a)=-40

We move all terms to the left:

4(1-5a)-8(1+2a)-(-40)=0

We add all the numbers together, and all the variables

4(-5a+1)-8(2a+1)-(-40)=0

We add all the numbers together, and all the variables

4(-5a+1)-8(2a+1)+40=0

We multiply parentheses

-20a-16a+4-8+40=0

We add all the numbers together, and all the variables

-36a+36=0

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

-36a=-36

a=-36/-36

a=1

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