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10a+55b = 198000 X 7
55a+385b= 1038000 X1
-
70a+ 385b = 1386000
55a+ 385b = 1038000
-
25a = 348000
a = 13920
disubtitusikan
10 a +55 b= 198000
10(13920)+ 55b= 198000
55b = 198000-139200
b = 1069,09
10a = 198.000 - 55b
a =( 198.000 - 55b) /10
a = 19.800 - 5,5b
55a + 385b = 1.038.000
55(19.800 -5,5b) + 385b = 1.038.000
1.089.000 - 302,5b + 385b = 1.038.000
82,5b = 1.038.000 - 1.089.000
82,5b = - 51.000
b= - 51.000 /82,5 atau 618.181818
a = 19.800 - 5,5b
= 19.800 - 5,5(-51.000/82,5)
= 19.800 + 280.500 / 82,5
= 1.633.500/82,5 + 280.500/82,5
= 1.914.000/82,5
= 23.200