Toán Lớp 8: Giai phương trình :
a/ 0,001x + 0,003y = 0,075
x + y = 50
b/ 0,0315x + 0,112y = 176
x + y = 2000
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Toán Lớp 8: Giai phương trình :
a/ 0,001x + 0,003y = 0,075
x + y = 50
b/ 0,0315x + 0,112y = 176
x + y = 2000
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