there so many question possibilities and the do many possibilities for answers
9a-ab+5b
9(2)-(2)(7)+5(7)
18-14+35
39
0, 12, 36, 108
just plug n (1,2,3,4) into the equation and that’s your answer.
The known facts
- the sum of Natalie's age and Fred's age is 36
- the sum of Fred's age times four and Natalie's age is 72
Now, let's set up the equations where N is Natalie's age and F is Fred's age.
N + F = 36 ---- equation 1
N + 4F = 72 ---- equation 2
equation 2 minus equation 1 ---> 3F = 36 ---> F = 12, thus N = 24
Thus Fred is 12 years old, and Natalie is 24 years old.
