(a) Let the unknown number be’x’
8 times a number be 8x
According to the question
8x + 4 = 60
8x = 60 – 4
8x = 56
∴ The unknown number x be 7
(b) Let the unknown number be x
Then according to the question
(c) Let the unknown number be x
According to the question
∴ That unknown number be 24.
(d) Let the unknown number be x
According to the question
2x – 11 = 15
2x = 15 + 11
2x = 26
∴ That unknown number be 13.
(e) Let the unknown number be x
According to the question
50 – 3x = 8
– 3x = 8 – 50
Therefore that unknown number be 14.
(f) Let the unknown number be x
According to the question
∴ That unknown number be 21
(g) Let the unknown number be x
According to the question
That unknown number be 12