Answer:
Step-by-step explanation:
decrease 7%
100 - 7% = 93
increase 12%
93 + 12% = 104.16
104.16 - 100 = 4.16%
i am positive it is x+y+z
i'm so sorry if this is wrong..hope this helped :)
2x/3 - 5 = 21
2x/3 = 26
2x = 78
x = 39
OPTION A is the answer.....