Jawapan

2016-03-28T23:24:35+08:00
R - 2s = 26 ..... (A) 3r + 4s = - 2 .....(B) r = 2s + 26 ......(C) ganti (C) ke dlm (B) 3(2s + 26) + 4s + s =0 6s + 78 + 4s + 2 =0 10s + 80 =0 10s = - 80 s = - 8 ....ganti dlm mne2 equation (A) / (B) 3r + 4s = - 2 3r + 4(- 8) = - 2 3r - 32 = - 2 3r = - 2 + 32 3r = 30 r = 10
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2016-03-28T23:54:28+08:00
R - 2s = 26
r = 26 + 2s

3(26+2s) + 4s + 2 = 0
78 + 6s + 4s + 2 =0
10s = - 80
s = - 8

r = 26 + 2(-8)
r = 26 - 16
r = 10
2 5 2