a man has 35 models. he has 4 times as many airplane models as he does helicopter models. how many airplane models does he have?
helicopters --- H
airplanes ----- 4H
H+4H = 35
5H = 35
H = 7
so .....
To find the number of airplane models the man has, we need to set up an equation based on the information given. Let's represent the number of helicopter models with 'x'.
We know that the man has 4 times as many airplane models as helicopter models. So the number of airplane models would be 4 times 'x', or 4x.
The total number of models the man has is given as 35. Therefore, we can set up the equation:
x + 4x = 35
Combining like terms, we get:
5x = 35
To find the value of 'x', we divide both sides of the equation by 5:
x = 35 รท 5 = 7
So, the man has 7 helicopter models. To find the number of airplane models, we multiply the number of helicopter models by 4:
Airplane models = 4x = 4 * 7 = 28
Therefore, the man has 28 airplane models.