21x-12+10x+9+90+8x=360

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Solution for 21x-12+10x+9+90+8x=360 equation: 



21x-12+10x+9+90+8x=360

We move all terms to the left:

21x-12+10x+9+90+8x-(360)=0

We add all the numbers together, and all the variables

39x-273=0

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

39x=273

x=273/39

x=7

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