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tungtcln
2 năm trước
a) 7x + 21 = 0 b) 5x - 2 = 0 c) -2x - 28 = 0 d) 0,25x +1,5 = 0 Bài 5. Giải các phương trình sau a) 3x-2 = 2x – 3 b) 2x+3 = 5x + 9 c) 7+ 2x = 22 – 3x d) 8x – 3 = 5x +12 e) 2x – 3 + 5x = 4x +12 g) 5 - (x - 6) = 4(3 - 2x)
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