Test: Simultaneous Equations - Challenging

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Question 1:   Solve: { 7x+7y=0 2x5y=1
{ x= 1 2 y= 1 2
{ x=1 y=1
{ x= 1 5 y= 1 5
{ x= 1 7 y= 1 7
Question 2:   Solve: { 2x3y3=0 1 2 y+2y+7=0
{ x=3 y=2
{ x=4 y=5
{ x=6 y=5
{ x=7 y=4
Question 3:   Solve: { 2xy 2 y=9 2xy+2=0
{ x=2 y=3
{ x=3 y=4
{ x=1 y=1
{ x=4 y=4
Question 4:   Solve: { 4x3y+1=0 2x+2y 1 3 =0
{ x= 1 5 y= 1 6
{ x= 1 2 y= 1 3
{ x= 1 3 y= 2 3
{ x=2 y=3
Question 5:   Solve: { x+y=5 xy=6
{ x=1 y=6
{ x=1 y=6
{ x=2 y=3
{ x=1 y=4
Question 6:   Solve: { x+y=2 xy=3
No answer
{ x=0 y=2
{ x=1 y=1
{ x=1 y=3
Question 7:   Solve: { x+y4=0 x 2 + y 2 8=0
{ x=2 y=4
{ x=2 y=2
{ x=1 y=3
{ x=3 y=5
Question 8:   Solve: { xy=6 2x 1 2 xy2y=7
{ x=2 y=3
{ x= 1 2 y=12
{ x=9 y= 2 3
{ x=1 y=6
Question 9:   Solve: { 2x3y+z=3 x+ 1 2 y2z=8 x+y+z=6
{ x=1 y=2 z=5
{ x=1 y=2 z=3
{ x=1 y=2 z=4
{ x=1 y=2 z=5
Question 10:   Solve: { x+y+z=6 xyz=4 x+yz=0
{ x=4 y=3 z=1
{ x=2 y=2 z=2
{ x=1 1 2 y=2 1 2 z=2
{ x=1 y=2 z=3