Question

7. Find the value of x.
a) 5x = (45)2 – (40)2
b) 7x = (35)2 – (21)
c) 9x = (27)2 – (18)2
d) 8x = (24)2 – (16)2​

Answer 1

Answer:

a ) 5x = 90-80

5x = 10

x = 2

b) 7x = 70-21

x= 49/7

x= 7

c) 9x = 2 ( 27-18)

9x = 18

x = 2

d) 8x = 2 (24-16)

8x = 16

x = 2