Sam is 4 times Victor's age. In 12 years, Sam will be 2 times Victor's age. How old is Victor now?
S=4V
S+12=2(V+12)
S+12=2V+24
S= 2V+24-12
S=2V+12
4V=2V+12
2V=12
V=6
S=4*6=24
Victor is 6 years old now :)
And here is Victor