8x+21+x+4x-2=90

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Solution for 8x+21+x+4x-2=90 equation: 



8x+21+x+4x-2=90

We move all terms to the left:

8x+21+x+4x-2-(90)=0

We add all the numbers together, and all the variables

13x-71=0

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

13x=71

x=71/13

x=5+6/13

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