7x+31+21x-19=90

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Solution for 7x+31+21x-19=90 equation: 



7x+31+21x-19=90

We move all terms to the left:

7x+31+21x-19-(90)=0

We add all the numbers together, and all the variables

28x-78=0

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

28x=78

x=78/28

x=2+11/14

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