Answer:
2z +3
Step-by-step explanation:
This question simply involves understanding what like terms are, and how to combine them.
Here, 5z and -3z are like terms, so we combine them by going 5z-3z = 2z
(i.e. we minus the coefficients, but the z stays unchanged).
Next, the number term of 3 in the middle cannot be combined with any other term, so it just stays in the expression.
