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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: $\frac{2-x}{4}$ = $\frac{3x-1}{3}$ Giúp mik với mn

Toán Lớp 7: $\frac{2-x}{4}$ = $\frac{3x-1}{3}$
Giúp mik với mn

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    (2-x)/4 = (3x-1)/3
    -> 3.(2-x) = 4.(3x-1)
    -> 6-3x=12x-4
    -> -12x-3x=-4-6
    -> -15x=-10
    -> x=10/15
    -> x=2/3
               Vậy x=2/3 

  2. (2-x)/4 = (3x-1)/3
    (2-x).3 = (3x-1).4
    6-3x=12x-4
    6-3x-12x=-4
    6-15x=-4
    15x=10
    x=10/15
    x=2/3

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222-9+11+12:2*14+14 = ? ( )