13 (z - 4) - 3 (z - 9) - 5 (z + 4) = 0
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Step-by-step explanation:
Given,
13(z - 4) - 3(z - 9) - 5(z + 4) = 0
13z - 52 - 3z + 27 - 5z - 20 = 0
5z - 45 = 0
z = 45/5
z = 9
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