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Q.4 Solve the following equations:
(a) 10p = 100
(b) 10p + 10 = 100
(c) p/4=5
(d) -p/3=5
(e) 3p/4=6
(f) 3s = -9
(g) 3s + 12 = 0
(h) 3s = 0
(i) 2q = 6
(j) 2q – 6 = 0
(k) 2q + 6 = 0
(l) 2q + 6 = 12

Answer :

(a) 10p=100
Or, p=100/10 = 10
(b) 10p+ 10 = 100
Or, 10p=100-10
Or, 10p=90
Or, p = 90/10 = 9
(c) p/4 = 5
Or, p= 5×4 = 20
(d) -p/3 = 5
Or, -p= 5×3
Or, -p= 15
Or, p=-15
(e) 3p/4 = 6
Or, 3p= 6×4
Or, p= 24/3
Or, p= 8
(f) 3s= -9
Or, s = -9/3 = -3
(g) 3s+12 =0
Or, 3s = -12
Or, s = -12 /3
Or, s = -4
(h) 3s = 0
Or, s =0/3
Or, s= 0
(i) 2q =6
Or, q =6/2= 3
(j) 2q-6= 0
Or, 2q= 6
Or, q= 6/2
Or, q=3
(k) 2q+6= 0
Or, 2q = 0-6
Or, q = -6/2 = -3
(l) 2q+6 = 12
Or, 2q= 12-6
Or, 2q= 6
Or, q=6/2 =3