Answer:
x=-21 y=-6
Step-by-step explanation:
7y-4(5y+9)=42
7y-20y-36=42
-13y=78
y=-6
x=5*(-6)+9
x=-30+9
x=-21
15 / 100 × 34
5.1 price he save
gill bought 20 pencils
10 pencils in each pack × 2 packs = 20 pencils in total
3rd option
