September 2, 2010

Simultaneous Equations



1.2x - 3y = -26 and 4x - 7y = -60
Answer: x = -1; y = 8
2.3x + 5y = 21 and 7x - 2y = -74
Answer: x = -8; y = 9
3.3x + 7y = -42 and 8x + 9y = -25
Answer: x = 7; y = -9
4.5x - 3y = 51 and 7x + 5y = 7
Answer: x = 6; y = -7
5.8x - 7y = 58 and 5x + 3y = 51
Answer: x = 9; y = 2
6.3x - 5y = 7 and 9x - 4y = -34
Answer: x = -6; y = -5
7.5x + 8y = -37 and 3x - 2y = 5
Answer: x = -1; y = -4
8.9x - 5y = -81 and 3x - 8y = -84
Answer: x = -4; y = 9
9.4x + 5y = 59 and 2x - 7y = -37
Answer: x = 6; y = 7
10.9x + 2y = 37 and x + 7y = 38
Answer: x = 3; y = 5
11.9x - 8y = -31 and 7x - 4y = -13
Answer: x = 1; y = 5
12.7x - 5y = -63 and 2x + 9y = 55
Answer: x = -4; y = 7
13.6x + 5y = 75 and 8x + 3y = 67
Answer: x = 5; y = 9
14.4x - 9y = 32 and 3x - 2y = 5
Answer: x = -1; y = -4
15.4x + 7y = -45 and 3x - 8y = 59
Answer: x = 1; y = -7
16.x + 8y = 19 and 5x + 2y = 19
Answer: x = 3; y = 2
17.5x + 3y = -15 and 6x + 5y = -11
Answer: x = -6; y = 5
18.3x - 4y = 19 and 9x + 5y = 91
Answer: x = 9; y = 2
19.2x - 3y = -14 and 4x - 7y = -36
Answer: x = 5; y = 8
20.5x + 7y = -69 and 3x + 2y = -26
Answer: x = -4; y = -7
21.8x + 7y = 79 and 2x - 9y = 9
Answer: x = 9; y = 1
22.9x - 7y = -12 and 9x - 5y = -6
Answer: x = 1; y = 3
23.7x - 6y = -7 and 5x + 4y = 53
Answer: x = 5; y = 7
24.7x - 2y = -37 and 6x - 7y = -37
Answer: x = -5; y = 1
25.7x - 8y = -10 and 3x + 2y = 12
Answer: x = 2; y = 3
26.6x + 5y = 53 and 2x - 7y = -43
Answer: x = 3; y = 7
27.3x - 8y = 61 and 6x + 5y = -46
Answer: x = -1; y = -8
28.4x - y = -3 and 5x + 4y = 33
Answer: x = 1; y = 7
29.9x + 7y = 47 and 5x + 2y = 28
Answer: x = 6; y = -1
30.9x + 8y = 49 and 7x + 4y = 27
Answer: x = 1; y = 5