45-x-4=20

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Solution for 45-x-4=20 equation: 



45-x-4=20

We move all terms to the left:

45-x-4-(20)=0

We add all the numbers together, and all the variables

-1x+21=0

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

-x=-21

x=-21/-1

x=+21

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