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

Toán Lớp 6: x-3/4=x-4/3 Tìm x: nhanh giúp mình nha

Toán Lớp 6: x-3/4=x-4/3
Tìm x: nhanh giúp mình nha

Comments ( 2 )

  1. (x-3)/4=(x-4)/3
    \to 3(x-3)=4(x-4)
    \to 3x-9=4x-16
    \to 3x-4x=-16+9
    \to -x=-7
    \to x=7
    Vậy x=7

  2. @Thỏ
    $\frac{x-3}{4}$ = $\frac{x-4}{3}$ 
    ⇒ $3(x-3)^{}$ = $4(x-4)^{}$ 
    ⇒ $3x^{}$ – 9 = $4x^{}$ – 16
    ⇒ $-x^{}$ = -7
    ⇒ x = 7
     

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