4-4xx=21

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Solution for 4-4xx=21 equation:



4-4xx=21
We move all terms to the left:
4-4xx-(21)=0
We add all the numbers together, and all the variables
-4xx-17=0
We move all terms containing x to the left, all other terms to the right
-4xx=17
x=17/1
x=17

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