**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.