The we of a father is 2 less than 7 times the age of his son. In 3 years, the sum of their ages will be 52. If the son’s present age is s years, which equation models this situation ?
Replace F in F + S, with our previous equation, so that we can only have one type of letter on any side at any given time
so in this case we have, (S × 7 - 2) + S = 46 We can remove the brackets, as they are not necessary in this case S × 7 - 2 + S = 46 Remove -2 by adding 2 on both sides S × 7 + S = 48 Simplify S × 8 = 48 divide both sides by 8 S × 8/8 = 48/8 S = 6
