18+8x=-2y
18+8x/-2=-2y/-2
-8-4x=y
Answer:

Step-by-step explanation:
First we move the constant to the right and change its sign
we add the numbers and divide it by 3
and you get 8
Answer:
18/35
Step-by-step explanation:
1 1/5 ÷ 2 1/3
Change from mixed numbers to improper fractions
1 1/5 = (5*1+1)/5 = 6/5
2 1/3 = (3*2+1)/3 = 7/3
6/5÷ 7/3
Copy dot flip
6/5* 3/7
18/35
The first one is cost of jam $4, cost of soup $7
We can multiply the number of parts Marsha has finished by the miles of each part:
5 × 1/10
= 5/10
=1/2
Therefore, she raced 1/2 miles.
Hope it helps!