Respuesta :
Answer:
3x + 15
Step-by-step explanation:
The expression would be 3x + 15 I just did this one ;)
The age of the son = 12 years
The age of the father = 42 years
The expression that represents the father's age 3 years from now = 3x + 15
x = son's age 2 years ago
let
y = Father's age 2 years ago
Two years ago a father was 4 times as old as his son. This can be represented as follows:
- y = 4x
Three years from now the father will only be only three times as olds as the son. This can be represented below
- y + 2 + 3 = 3(x + 2 + 3)
- y + 5 = 3(x + 5)
- y + 5 = 3x + 15
- y = 3x + 10
4x = 3x + 10
4x - 3x = 10
x = 10(son's age 2 years ago)
y = 3(10)+ 10 = 40(Father's age 2 year ago)
The son's age now = 10 + 2 = 12 years
The father's age now = 40 + 2 = 42 years
The expression that represents the father's age three years from now = 3x + 15
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