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3+k/4-13=-15
We move all terms to the left:
3+k/4-13-(-15)=0
We add all the numbers together, and all the variables
k/4+5=0
We multiply all the terms by the denominator
k+5*4=0
We add all the numbers together, and all the variables
k+20=0
We move all terms containing k to the left, all other terms to the right
k=-20
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