(iii) 13 (z – 4) – 3 (z - 9) - 5 (z + 4) = 0
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Answer:
z=9
Step-by-step explanation:
13(z-4)-3(z-9)-5(z+4)=0
13z-52-3z+27-5z-20=0
13z-8z-52+27-20=0
5z-72+27=0
5z-45=0
5z=45
z=45÷5
z=9
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