Question

x+y=80,2x+5y=220solve using elimination method​

Answer 1

Answer:

Given Equation is 2x + 5y = (8/3) --------- (1)

Given Equation is 3x - 2y = (5/6) --------- (2)

On solving (1) * 3 & (2) * 2 , we get

= > 6x + 15y = 8

= > 6x - 4y = 5/3

--------------------

19y = 8 - (5/3)

19y = 19/3

y = 1/3.

Substitute y = (1/3) in (1), we get

= > 2x + 5y = (8/3)

= > 2x + 5(1/3) = (8/3)

= > 2x + 5/3 = 8/3

= > 2x = 8/3 - 5/3

= > 2x = 3/3

= > 2x = 1

= > x = 1/2.

Therefore the value of x = 1/2 and y = 1/3.

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Answer 2

Answer:

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