31-3x=121

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Solution for 31-3x=121 equation:



31-3x=121
We move all terms to the left:
31-3x-(121)=0
We add all the numbers together, and all the variables
-3x-90=0
We move all terms containing x to the left, all other terms to the right
-3x=90
x=90/-3
x=-30

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