Toán Lớp 6: Tìm x
A) x = 6
7 -21
B) x- 2 = -5
3 12
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Toán Lớp 6: Tìm x
A) x = 6
7 -21
B) x- 2 = -5
3 12
Comments ( 2 )
a) frac{x}{7} = frac{6}{-21}
=> x . (-21) = 7 . 6
=> x . (-21) = 42
=> x = 42 : (-21)
=> x = -2
Vậy x = -2
b) x – 2/3 = frac{-5}{12}
=> x = frac{-5}{12} + 2/3
=> x = 3/12 = 1/4
Vậy x = 1/4
a, x/7 = 6/(-21)
=> x . (-21) = 7 . 6
=> x . (-21) = 42
=> x = -2
Vậy ..
b, x – 2/3 = (-5)/12
=> x = (-5)/12 + 2/3
=> x = (-5)/12 + 8/12
=> x = 3/12 = 1/4
Vậy ,…