There are an infinite set of values which would work
Answer:
I think is -x + 105/42y
Step-by-step explanation:
2(3/10)x - 5/7y - 4(5/6)y - 2(4/5)x
6/10x - 5/7y - 20/6y - 8/5x
6/10x - 8/5x - 5/7y - 20/6y
6-16/10x - 35+140/42y
-10/10x + 105/42y
-x + 105/42y
d. every twentieth name on a roster of all students at school
1,3,5 because they are all negatives less than -3
23,457 - 19,436 = 4,021
23,457 + 4,021 = 27,478
total income next year - 27,478
