Answer:
Part a) Daniel's age is 2 years
Part b) Kevin's age is 8 years
Step-by-step explanation:
The question is
Part a) How old is Daniel?
Part b) How old is Kevin?
Let
x ----> Kevin's age
y ----> Daniel's age
we know that
[tex]x=4y[/tex]-----> equation A
[tex]x=y+6[/tex] ----> equation B
Equate equation A and equation B
[tex]4y=y+6[/tex]
solve for y
[tex]4y-y=6[/tex]
[tex]3y=6[/tex]
[tex]y=2[/tex]
therefore
Daniel's age is 2 years
Find the value of x
substitute the value of y in any of the two equations
[tex]x=4(2)=8\ years[/tex]
[tex]x=2+6=8\ years[/tex]
therefore
Kevin's age is 8 years