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z/7+4=-20
We move all terms to the left:
z/7+4-(-20)=0
We add all the numbers together, and all the variables
z/7+24=0
We multiply all the terms by the denominator
z+24*7=0
We add all the numbers together, and all the variables
z+168=0
We move all terms containing z to the left, all other terms to the right
z=-168
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