SOLUTION: Ingrid"s age is 5 years less than 2 times Danika"s age. If Ingrid is 25 years old, which equationcan be used to determine Danika"s age?
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Question 133393: Ingrid"s age is 5 years less than 2 times Danika"s age. If Ingrid is 25 years old, which equationcan be used to determine Danika"s age?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Let I = Ingrid's age, let D = Danika's age
;
Write an equation for the statement
"Ingrid"s age is 5 years less than 2 times Danika"s age."
I = 2D - 5
;
It says:
If Ingrid is 25 years old," Therefore:
I = 25
:
which equation can be used to determine Danika"s age?
:
Just substitute 25 for I in the first equation and solve for D
25 = 2D - 5
25 + 5 = 2D
30 = 2D
D = 15
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