3x+21=4x-20

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Solution for 3x+21=4x-20 equation:



3x+21=4x-20
We move all terms to the left:
3x+21-(4x-20)=0
We get rid of parentheses
3x-4x+20+21=0
We add all the numbers together, and all the variables
-1x+41=0
We move all terms containing x to the left, all other terms to the right
-x=-41
x=-41/-1
x=+41

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