The value of z in the equation evaluation as given in the task content is; 3/5.
It follows from the task content that the value of z as in the task content can be evaluated as follows;
2 4/15-z= 1 2/3
34/15 - z = 5/3
Hence, z = 34/15 - 5/3
z = (34-25)/15 = 9/15
z = 3/5
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