20x+4=21x-1

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Solution for 20x+4=21x-1 equation: 



20x+4=21x-1

We move all terms to the left:

20x+4-(21x-1)=0

We get rid of parentheses

20x-21x+1+4=0

We add all the numbers together, and all the variables

-1x+5=0

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

-x=-5

x=-5/-1

x=+5

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