Lani is 3 times older than Tin . In 15 years the sum of their age is 38 . What is their present age ? Please help me .
L = 3 T
L + 15 + T + 15 = 38
substituting
... 3T + 15 + T + 15 = 38 = 4 T + 30
solve for T, then substitute back to find L
L + 15 + T + 15 = 38
substituting
... 3T + 15 + T + 15 = 38 = 4 T + 30
solve for T, then substitute back to find L