2x+5-4=31

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Solution for 2x+5-4=31 equation: 



2x+5-4=31

We move all terms to the left:

2x+5-4-(31)=0

We add all the numbers together, and all the variables

2x-30=0

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

2x=30

x=30/2

x=15

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