3 dozen = 36 cookies
20/12 = 1.666666666666667
1.666666666666667 = 1 cookie
(x36)
36 x 1.666666666666667 = 60
It will cost him $60 for 3 dozen cookies
Answer:
-5x/5 +5y/5=10/5=2
y-x=2
y=x+2
21x+7*(x+2)=42
21x+7x+14=42
28x=42-14
28x=28
x=1
y=1+2
y=3
Step-by-step explanation:

=

Cross multiply
12x=900 Divide both sides by 12.
x=75 hammers to begin with.
Answer: The 3 pieces of candy- one candy under that costs only 40 cents. The five pieces separated cost 50 cents each
To multiply a number, simply take a number (Let's say 4) and another number (Let's say 3). If you multiply 4 by 3, you are simply taking the number 4, and adding it to itself 3 times (4 + 4 + 4).
I hope this makes sense, please tell me if you need some more information.
Hope this helps!