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a=besar
b=kecil
a-b=25 => a=25+b
2a-b=175
2(25+b)-b=175
50+2b-b=175
50+b=175
b=175-50
b=125
a=25+b=25+125=150
jadi bilangannya adalah 150 dan 125
a - b = 25 -
a = 150
a - b =25
150 - b = 25
150 - 25 = b
125 = b