Question

5x+2y=10;x+y=10
find the value of x and y​

Answer 1

x+y=10 x=10-y

sub x in equation 1 I.e 5(10-y)+2y

50-5y+2y

50-3y=0

-3y=-50

y=50/3

sub y in x

x=10-50/3

30-50/3

-20/3

Answer 2

Answer:

Step-by-step explanation:

5x + 2y = 10 -----------(1)

x + y = 10 -------------(2)

x = 10 - y ------------(3)

substituting equation (3) in (1)

5 (10-y) + 2y = 10

50 - 5y + 2y = 10

50 - 3y = 10

-3y = -40

y = 40/3

substituting value of y in equation (3)

x = 10 - 40/3

x = 30 - 40/3 = -10/3