Answer:
Son's age = 24 years
Man's age = 48 years
Step-by-step explanation:
Let's take the age of son as x
Man's age = 2x
Twelve years ago,
Son's age= x-12
Man's age= 2x-12
Man is three times as old as his son so,
Solving for x,
2x-12(1) = x-12(3)
2x-12 = 3x-36
2x-3x = -36+12
-x = - 24
x = 24
So if we substitute the values we get,
Son's age = 24 years
Man's age = 48 years
Hope you understand :)
Answer:
D) 15
Step-by-step explanation:
We know the formula for direct variation is
y=kx
Substituting y=5 and x=4 we can calculate k
5=k4
Divide each side by 4
5/4 =k
Now y= 5/4 x
If x =12
y =5/4*12
y = 15
Answer:
7+ x/2
Step by step explanation:
“Seven more” is addition in word form, and “half of a number” refers to a variable (in this case x) being divided by 2. Hope this helps! :)
Let x denote the length of the longer first piece and y the length of the shorter piece.
We have x+y=10 and x=3y-2 hence 3y-2+y=10 => 4y=12 => y=3 => x=7
The shorter piece is 3 feet long
