contestada

In a shop, two customers order
Customer 1 pays £3.90 for a tea and two coffees.
Customer 2 pays £4.20 for three teas and a coffee.
How much does one cup of tea cost?

Respuesta :

adioabiola

The cost of a tea cup and a cup of coffee in the shop is £0.90 and £1.50 respectively.

How to write and solve equation?

let

  • x = cost of tea
  • y = cost of coffee

x + 2y = 3.90

3x + y = 4.20

Multiply (1) by 3 to eliminate x

3x + 6y = 11.70

3x + y = 4.20

5y = 7.50

y = 7.50/5

y = 1.50

Substitute y = 1.50 into (1)

x + 2y = 3.90

x + 2(1.50) = 3.90

x + 3 = 3.90

x = 3.90 - 3

x = 0.90

Learn more about equation:

https://brainly.com/question/2972832

#SPJ1

Otras preguntas