Answer:
[tex]-\frac{4}{9}z[/tex]-5
Step-by-step explanation:
You can only combine variables with like terms. Variables with like terms are [tex]\frac{7}{9} ( -\frac{6}{9} ) (-\frac{5}{9})[/tex] so 7/9 - 6/9 is 1/9 and 1/9 - 5/9 is -4/9. The other variables with like terms are 2 and (-7). 2 - 7 = -5. Now combining these two together we get the fraction -4/9 -5
