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

Toán Lớp 10: -2(x -3) +11 = 19 giúp mik nhé

Toán Lớp 10: -2(x -3) +11 = 19 giúp mik nhé

Comments ( 2 )

  1. Giải
    ${−2(x−3)+11=19}$
    ${−2x+6+11=19}$
    ${−2x+17=19}$
    ${−2x=19−17}$
    ${−2x=2}$
    $x=\dfrac{2}{-2}$
    $x={-1}$
    $=>$ Vậy $x=-1$
     

  2. -2(x-3)+11=19
    -2(x-3)=19-11
    -2(x-3)=8
    (x-3)=8:(-2)
    x-3=-4
    x=-4+3
    x=-1
    to Vậy x=-1 
     

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