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Kevin is 3 years older than Daniel. Two years ago, Kevin was 4 times as old as daniel.

How old is daniel now?

 Apr 16, 2020
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"Kelvin is 3 years older than Daniel" Let Kelvin be K and Daniel be D 

K=D+3 (1) (Well K>D so in order for D to be equal to K we have to add 3 since K Is more than D by 3)

"Two years ago, K was 4 times as old as daniel"

K=4D (2)

Solve the equation by substituting (2) into (1)

\(4D=D+3\) Subtract D 

\(3D=3\) Divide by 3

\(D=1\) Notice that is 2 years ago thus now D+2= 1+2=3 

So Daniel = 3 years old now

Kelvin is 6 years old now.

 Apr 16, 2020

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