Question

A pencil and an eraser cost € 1.40 (total cost).

Knowing that pencils are € 1 more expensive than eraser, how much does eraser cost?

Answer 1

Eraser cost €0,2

Explanation:

Cost of ereaser - x

Cost of pencil - x + 1

x + x + 1 = 1,4

2x + 1 = 1,4

2x = 0,4

x = 0,2