21-4x=-20

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Solution for 21-4x=-20 equation: 



21-4x=-20

We move all terms to the left:

21-4x-(-20)=0

We add all the numbers together, and all the variables

-4x+41=0

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

-4x=-41

x=-41/-4

x=10+1/4

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