21x-4+10x+1=90

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Solution for 21x-4+10x+1=90 equation: 



21x-4+10x+1=90

We move all terms to the left:

21x-4+10x+1-(90)=0

We add all the numbers together, and all the variables

31x-93=0

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

31x=93

x=93/31

x=3

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