Question

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Answer 1

(6 , -1)

Explanation:

2x+ y = 11 ----------------(I)

y = 11 - 2x --------------------(II)

`(1)/(2)x - 5y = 8`

Multiply the whole equation by 2

`2*(1)/(2)x -2*5y = 2*8`

x - 10y = 16 --------------------(III)

Substitute y = 11- 2x in equation (III)

x - 10(11 - 2x) = 16

x - 110 + 20x = 16

21x - 110 = 16

21x = 16 +110

21x = 126

x = 126/21

x = 6

Plugin x = 6 in equation (II)

y = 11 - 2*6

y = 11 - 12

y = -1