31x+2+9x+8=90

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Solution for 31x+2+9x+8=90 equation: 



31x+2+9x+8=90

We move all terms to the left:

31x+2+9x+8-(90)=0

We add all the numbers together, and all the variables

40x-80=0

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

40x=80

x=80/40

x=2

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