Test:
Simultaneous Equations - Challenging
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Question 1:
Solve:
{
7
x
+
7
y
=
0
2
x
−
5
y
=
1
A
{
x
=
1
7
y
=
−
1
7
B
{
x
=
1
5
y
=
−
1
5
C
{
x
=
1
2
y
=
−
1
2
D
{
x
=
1
y
=
−
1
Question 2:
Solve:
{
−
2
x
−
3
y
−
3
=
0
1
2
y
+
2
y
+
7
=
0
A
{
x
=
7
y
=
−
4
B
{
x
=
4
y
=
5
C
{
x
=
3
y
=
−
2
D
{
x
=
6
y
=
−
5
Question 3:
Solve:
{
2
x
−
y
2
−
y
=
9
−
2
x
−
y
+
2
=
0
A
{
x
=
2
y
=
−
3
B
{
x
=
4
y
=
−
4
C
{
x
=
1
y
=
−
1
D
{
x
=
3
y
=
−
4
Question 4:
Solve:
{
−
4
x
−
3
y
+
1
=
0
2
x
+
2
y
−
1
3
=
0
A
{
x
=
1
2
y
=
−
1
3
B
{
x
=
2
y
=
−
3
C
{
x
=
1
3
y
=
−
2
3
D
{
x
=
1
5
y
=
−
1
6
Question 5:
Solve:
{
x
+
y
=
5
x
⋅
y
=
6
A
{
x
=
2
y
=
3
B
{
x
=
−
1
y
=
6
C
{
x
=
1
y
=
4
D
{
x
=
1
y
=
6
Question 6:
Solve:
{
x
+
y
=
2
x
⋅
y
=
3
A
{
x
=
0
y
=
2
B
{
x
=
1
y
=
1
C
{
x
=
−
1
y
=
3
D
No answer
Question 7:
Solve:
{
x
+
y
−
4
=
0
x
2
+
y
2
−
8
=
0
A
{
x
=
2
y
=
2
B
{
x
=
−
2
y
=
4
C
{
x
=
−
3
y
=
5
D
{
x
=
1
y
=
3
Question 8:
Solve:
{
x
⋅
y
=
−
6
2
x
−
1
2
x
y
−
2
y
=
−
7
A
{
x
=
9
y
=
−
2
3
B
{
x
=
1
y
=
−
6
C
{
x
=
−
2
y
=
3
D
{
x
=
−
1
2
y
=
12
Question 9:
Solve:
{
2
x
−
3
y
+
z
=
−
3
−
x
+
1
2
y
−
2
z
=
−
8
x
+
y
+
z
=
6
A
{
x
=
1
y
=
2
z
=
3
B
{
x
=
1
y
=
−
2
z
=
4
C
{
x
=
−
1
y
=
−
2
z
=
5
D
{
x
=
−
1
y
=
2
z
=
5
Question 10:
Solve:
{
x
+
y
+
z
=
6
x
−
y
−
z
=
−
4
x
+
y
−
z
=
0
A
{
x
=
2
y
=
2
z
=
2
B
{
x
=
4
y
=
3
z
=
−
1
C
{
x
=
1
y
=
2
z
=
3
D
{
x
=
1
1
2
y
=
2
1
2
z
=
2
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