yashvinappadoo yashvinappadoo

02-01-2016
Mathematics

contestada

solve the simultaneous equations
3x-y=18
2x+y=7
answer x=
y=

Respuesta :

Billymkhoi Billymkhoi

02-01-2016

3x -y= 18 (1)
2x +y = 7 (2)

Take (1)+ (2):
(3x+2x)+ (-y+y)= 18+7
⇒ 5x = 25
⇒ x= 25/5
⇒ x=5

Use (2) to find y:
2*5+y= 7
⇒ 10+y=7
⇒ (10-10)+y= 7-10
⇒ y = -3

Final answer:
x=5, y=-3.

Hope this helps~

Answer Link

Otras preguntas

you have a full cylindrical glass of water that stands 8 inches tall and has a radius of 1.5 inches .if you pour the water into a larger cylindrical glass that

Please tell me five slogans on conservation of natural vegetation.

The circumference of a circle is 6.28.What is the area of the circle?

other name for blood

The circumference of a circle is 6.28.What is the area of the circle?

The graph of y = 4x - 11 is translated up 8 units. Which equation represents the translated graph? f y = 4x - 19 g y = 4x - 3 h y = 12x - 11 j y = 12x - 3

Horace read 160 pages in 4 hours. How many pages can he read in 6 hours??

what is the cause and effect for the french citizens armies win their revolution for liberty and equality

other name for blood

Two 1 litre jugs are each filled with a mixture of olive oil and vinegar. The first jug has 3 times as much as oil as vinegar and the second jug has 4 times as