Question

Which system of equations below has infinitely many solutions?

Answer 1

y = –3x + 4 and y = –3x – 4              no solution exists
y = –3x + 4 and 3y = –9x + 12           y=4-3x
y = –3x + 4 and y = -1/3x + 4              x=0, y=4
y = –3x + 4 and y = –6x + 8               x=4/3, y=0

Answer 2

Answer:

y = –3x + 4 and y = –3x – 4              no solution exists

y = –3x + 4 and 3y = –9x + 12           y=4-3x

y = –3x + 4 and y = -1/3x + 4              x=0, y=4

y = –3x + 4 and y = –6x + 8               x=4/3, y=0

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