Question

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Answer 1

D is right (there is exactly one soution at (3,1))

Explanation:

x+2y=5

3+2(1)=5

y=3x-8

1=3(3)-8

Answer 2

D

Explanation:

`x = 5 - 2y \\ y = 3(5 - 2y) - 8 \\ y = 15 - 6y - 8 \\ y = 7 - 6y \\ 7y = 7 \\ y = 1`

`x = 5 - 2y \\ x = 5 - 2 = 3 \\`