Question

In equation (i), we get
2 + 2 + z = 73 z = 3
x = 2, y = 1, z = 3
Hence,
ue of z.
EXERCISE 3.
Solve the following systems of equations:
1. 11x + 15y + 23 = 0
7x - 2y - 20 = 0
2. 3x - 7y + 10 = 0
y - 2x + 3 = 0
X
3. 0.4x + 0.3y = 1.7
4.
5+ y = 0.8
0.7x - 0.2y = 0.8
2
7
X +
= 10
Y
2
y
+
6.
5. 7(y + 3) - 2(x + 2) = 14
4(y - 2) + 3(x – 3) = 2
7
3
X
y
6.
2
9
4
Y
4
7
= 11
8.
= + 3y = 8
3
х
6
5x
1
Y
3
= -7
4y = 5
X
[СЕ
6​

Answer 1

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