Children=4
Notebooks=60
It said mama's got an amount of books, so you can transform this into a equation
X=children
Notebooks= 13x +8
Notebooks= 15x
Now you just establish a system of equations, thus notebooks=notebooks
13x + 8= 15x
2x=8
X= 4
39/1.5=26 for the 1.5 hours difference.
divide 26/2=13 for each person.
divide 4/2 for the speed increase of person north. The speeds much average to 13.
subtract 13-2=11 and add 13+2=15 for south and north.
north speed is 15 km per hour and south is 11 km per hour.
46 + 46
46 x 2
Hope this is what you were asking! Please comment or message me if not and explain what your were asking in a bit more detail!
Answer:
5^7
Step-by-step explanation: