Question

Find the whole number n when:
(i) n + 4 = 9
(ii) n + 35 = 101
(iii) n − 18 = 39
(iv) n − 20568 = 21403

Answer 1

(i) n + 4 = 9
⇒ n = 9 − 4 = 5

(ii) n + 35 = 101
⇒ n = 101 − 35 = 66

(iii) n - 18 = 39
⇒ n = 18 + 39 = 57

(iv) n − 20568 = 21403
⇒ n = 21403 + 20568 = 41971