The correct value of this simplification is -4/9z
Resolution - Explanation
Fraction is a representation of a division between two real integers. These two numbers numbers can be positive or negative. Its representation is given by, a/b, where: 'a' indicates numerator and 'b' indicates denominator.
Given the expression,
,: In a fraction addition and subtraction with equal denominators, we: add/subtract the numerators and keep the denominators




Therefore, the final answer to this simplification will be -4/9z