Answer:
first and third one
Explanation:
did the test on edge
y= 2x - 4........(1)
3y - x = -7.......(2)
Putting (1) into (2)
3(2x - 4) - x = -7
6x - 12 - x = -7
6x - x = -7 + 12
5x = 5
x = 5/5
x = 1
And y = 2x - 4 ...(1)
y = 2(1) - 4
y = 2 - 4
y = -2
5.6m questions
7.3m answers