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j+21/2=-9
We move all terms to the left:
j+21/2-(-9)=0
We add all the numbers together, and all the variables
j+9+21/2=0
We multiply all the terms by the denominator
j*2+21+9*2=0
We add all the numbers together, and all the variables
j*2+39=0
Wy multiply elements
2j+39=0
We move all terms containing j to the left, all other terms to the right
2j=-39
j=-39/2
j=-19+1/2
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