Seven years ago, Grogg's dad was 6 times as old as Grogg, and 4 years ago, his dad was 4 times as old as Grogg. How old is Grogg's dad currently?
D = Dad, G = Grogg
D - 7 = 6[G - 7],
D - 5 =5[G - 5], solve for G, D
G = 15 years - Grogg's current age
D = 55 years - Dad's current age.
Note: For the 2nd part, I used 5 years instead of 4 years ago, because 4 years ago, you get fractions in Grogg's age. You are not supposed to have fractions in questions of this sort. You can change it.
+135 From the first piece of information, we can set up an equation:
D - 7 = 9(G - 7)
Simplifying this equation, we get:
D - 7 = 9G - 63
D = 9G - 56
From the second piece of information, we can also set up an equation:
D - 6 = 7(G - 6)
Simplifying this equation, we get:
D - 6 = 7G - 42
D = 7G - 36
Now we can combine the two equations:
9G - 56 = 7G - 36
Solving for G, we get:
2G = 20
G = 10
So currently, Grogg is 10 years old. We can substitute this value back into either equation to find his dad's age:
D = 9G - 56
D = 9(10) - 56
D = 34
Therefore, Grogg's dad is currently 34 years old.
+214 This question cannot be answered correctly, since Grogg's dad's age has to be both a multiple of 4 (even) and seven (or one) more than a multiple of 6 (odd). Since it cannot be even or odd, there is no answer. If you typed incorrectly, the other answers may prove useful to you.
