Question

Three shirts and two trousers cost 126 €. A trouser has double price of a shirt, how much is a shirt?, how much is a trouser?​

Answer 1

Respuesta:

18 €, is the cost of one shirt, and

36 €, is the cost of one trouser

Explicación paso a paso:

one shirt = x

one trouser = y

problem: Three shirts and two trousers cost 126 €

[1 Eq.]                  3x+2y=126;

Additionally: A trouser has double price of a shirt,

y=2x

we can replace this in the first equation

3x+2(2x)=126

3x+4x=126

7x=126

x=126/7

x=18 €, is the cost of one shirt, and

y=2x=2(18)=36 €, is the cost of one trouser