4(-5)=x

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Solution for 4(-5)=x equation: 



4(-5)=x

We move all terms to the left:

4(-5)-(x)=0

We add all the numbers together, and all the variables

-1x-20=0

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

-x=20

x=20/-1

x=-20

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