Question

How to solve if 5a=6 and 7b=8, 35ab=
(please explain, i need explaination)

Answer 1

35ab = 48

Explanation:

given

5a = 6 ( divide both sides by 5 )

a =
`(6)/(5)`

and

7b = 8 ( divide both sides by 7 )

b =
`(8)/(7)`

substitute these values for a and b into the expression and simplify

35ab

= 35 ×
`(6)/(5)` ×
`(8)/(7)` ( divide 35 and 5 by 5 )

= 7 × 6 ×
`(8)/(7)`

= 42 ×
`(8)/(7)` ( divide 42 and 7 by 7 )

= 6 × 8

= 48