Ineed on number 28 teacher just gave hw without explanation

Goal # = 82

Since we know we can't get "2"
using a multiple of the number [10]
therefore we must check [8]

[8] * 4 = 32
72 - 32 = 40
40 / [10] = 4

[] = $ per job

With this information we could say that:
Destiny made $72 from 8 jobs, 4 being mowing, and another 4 were weeding. Mowing 4 lawns earned her $32 while weeding 4 gardens earned her $40

X=3 and y=4 is the answer