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bil 1 = y
x + y = 145
x - y = 47 -
2y = 98
y = 98/2 = 49
cari x
x+y = 145
x+49 = 145
x=145-49=96
maka {x,y}={96,49}
Bilangan 2=b
a+b=145
a-b=47
_______-
2b=98
b=49
a=96