Age Problem
Answer:
Kassim is [tex]15[/tex] years old this year.
Step-by-step explanation:
Let [tex]k[/tex] be Kassim's age this year.
Kassim's age after [tex]30[/tex] years is [tex]k +30[/tex]. Also, [tex]3[/tex] times the age of Kassim is [tex]3k[/tex]. We are told that after [tex]30[/tex] years, Kassim's age will be [tex]3[/tex] times as his age. So, [tex]k +30 = 3k[/tex].
Solving for [tex]k[/tex]:
[tex]k +30 = 3k \\ k +30 -3k = 3k -3k \\ -2k +30 = 0 \\ -2k +30 -30 = -30 \\ -2k = -30 \\ \frac{-2k}{-2} = \frac{-30}{-2} \\ k = 15[/tex]
