New Learning Composite Mathematics Class 6 SK Gupta Anubhuti Gangal Algebra Chapter 7F Solution
(1) (a) 5 + y = 18
Or, y = 18 – 5
∴ y = 13
(b) – 3 + t = 5
Or, t = 5 + 3
∴ t = 8
(c) x – 7 = 3
Or, x = 3+7
∴ x = 10
(d) a + 8 = – 4
Or, a = – 4 – 8
∴ a = – 12
(e) P – 28 = – 7
Or, P = – 7 + 28
∴ P = 21
(f) 6m = 24
Or, m = 24/6
∴ m = 4
(g) – 5n = 45
Or, n = 45/5
∴ n = – 9
(h) r/3 = 6
Or, r = 6 X 3
∴ r = 18
(i) z/-9 = 7
Or, z = 7 X (-9)
∴ z = – 63
(j) b – 25 = – 8
Or, b = – 8 + 25
∴ b = 17
(2) Let, the person’s weight on earth be x according to statement,
x/6 = 10
Or, x = 6 X 10
∴ x = 60
Ans – The person’s weight on earth is 60 kg.
(3) Let, the length each side be P according to statement.
5P = 35
Or, P = 35/5
∴ P = 7
Ans – The length of each side is 7 cm.
(4) Let, the speed of the train be s
5s = 300
Or, s = 300/5
∴ s = 60
Ans – The speed of the train is 60 km/hr.
(5) According to statement,
6000 – m = 1500
Or, – m = 1500 – 6000
Or, – m = – 4500
∴ m = 4500
Ans – His monthly expenditure is RS 4500.
(6) According to statement,
4S = 100
Or, S = 100/4
∴ S = 25
Ans – Length of one side of the field is 25 m.
