Question

How to calculate x and y ?

Answer 1

Answer:

x + 2y = 160. ....(1)

and

3x + 2y = 180 ...(2)

subtract ...(1) from ...(2)

we get

2x = 20

x = 10

and put x = 10 in any of the equation

we get

2y = 150

y = 75

Answer 2

Answer:

3x+2y=180

(-) x+2y=150

• x=15
• then y=
• 67.5