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7x+4=13+4
We move all terms to the left:
7x+4-(13+4)=0
We add all the numbers together, and all the variables
7x+4-17=0
We add all the numbers together, and all the variables
7x-13=0
We move all terms containing x to the left, all other terms to the right
7x=13
x=13/7
x=1+6/7
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