now we are going to simplify what we have. if you have minus a negative number, the negatives cancel out, and sow we actually add -3 and the --2 turns into 2. (so -3 + 2)
Let F be the father's current age, and E be Evie's current age. F = E + 36 this is the current relation between the ages F + 3 = 5(E + 3) this the relationship in 3 year (hence the + 3) Then solve by substituting one equation into another: (E + 36) + 3 = 5(E + 3) E + 39 = 5E + 15 24 = 4E 6 = E Evie's current age is 6.
The order that the pitcher threw is F, C, F, F, C, C, F, F, F then the next five pitches are C, C, C, C, F, F, F, F, F assuming the pitcher maintains this order