f = 3c
f+5 = 2(c+5)
Substitute 3c for f in the second equation and solve for c. Insert that value into the first equation to solve for f. Check by putting both values into the second equation.
A father's age is three times the age of his childs. After five years of age, father's age childs would double the sum, the father's age -
please help me for this question here is not given number of child.
2 answers
age of father 15.age of son 5