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tunganh6dvppro
2 năm trước
Bài 1: Tìm số nguyên x, biết: a) 2x + 3 là bội của x b) 2x + 1 là ước của 4x – 8 c) x2 + x – 7 chia hết cho x + 1 Bài 2: Tìm các số nguyên x, y biết: a) (x – 2) (y + 3) = 7 b) (x + 1) (2y – 3) = 10 c) xy – 3x = -19 d) 3x + 4y – xy = 16 Bài 3:Tìm x: a,15-3(x-2)=21 b,x-14=3x+18 c,(x+5)+(x-9)=x+2 d,x-14=3x+18
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