Toán Lớp 6: 2x – ( – 21 ) = 15
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Toán Lớp 6: 2x – ( – 21 ) = 15
giúp mình với ạ
Comments ( 2 )
2x = 15 – 21
2x = -6
x = -6 : 2
x = -3
Vậy x = -3