Need with Qu. 20
I don't know how to do it

The answer is either 3 or 15

Step-by-step explanation:

1.Multiply

2. combine like terms

3. Subtract 18k-14k

4. then which gives you 4

5. 4k-36-24

6.4k=12

7. k =3

the reason y I also say 15 is because if you go back over to step 5 and put add instead you would get 60.

it would look like this

4k - 36 + 24

+24 - 24

4k = 60

k = 15

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: