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10A+4B = 9500.............2
eliminasi A dari pers 1 dan 2:
10A+30B = 40000
10A+ 4B = 9500 (-)
26B = 30500
B = 15.250/13 ; maka A = 6250/13
A+B = 21.500/13
= 1653.......salah soal kayaknya.....
A + 3B = 4.000
10A + 4B = 9.500
.
10a + 30B = 40.000
10A + 4 B = 9.500
.
26B = 30.500
B = 30.500/26
A= 4000 - 3B
A = (4000 - 91.500/26)
A= 12/500/26
A+B = 30.500/26 + 12.500/26
A+B = 43.000 /26
A + B = 1.653,85