Tìm x biết: 3/8 . (x – 2/3) – 2/9 . (3x – 1/2) = -7/36 22/11/2021 Bởi Valerie Tìm x biết: 3/8 . (x – 2/3) – 2/9 . (3x – 1/2) = -7/36
3/8 . (x – 2/3) – 2/9 . (3x – 1/2) = -7/36 3/8x – 1/4 – 2/3x + 1/9 = -7/36 -7/24x – 5/36 = -7/36 -7/24x = -7/36 + 5/36 -7/24x = -1/18 x = 4/21 Bình luận
3/8 . (x – 2/3) – 2/9 . (3x – 1/2) = -7/36
3/8x – 1/4 – 2/3x + 1/9 = -7/36
-7/24x – 5/36 = -7/36
-7/24x = -7/36 + 5/36
-7/24x = -1/18
x = 4/21
Đáp án:
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