1: Find the total cost of 25 pens and 75 books if each pen costs GH¢0.20 and each book
costs GH¢0.30.
ITI​

0.2 x 25 = 5

0.3 x 75=22.5

22.5+5=27.5

Step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: