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

Toán Lớp 8: $\frac{-2x+1}{3(x+1)}$ +$\frac{x}{x+1}$

Toán Lớp 8: $\frac{-2x+1}{3(x+1)}$ +$\frac{x}{x+1}$

Comments ( 2 )

  1. (-2x+1)/(3(x+1))+x/(x+1)
    =(1-2x)/(3(x+1))+(3x)/(3(x+1))
    =(1-2x+3x)/(3(x+1))
    =(x+1)/(3(x+1))
    =1/3
     

  2. Giải đáp+Lời giải và giải thích chi tiết:
    (-2x+1)/(3(x+1)) + x/(x+1)
    =(1-2x)/(3(x+1)) + (3x)/(3(x+1))
    =(1-2x +3x)/(3(x+1)
    = ( x +1)/(3(x+1))
    = 1/3

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

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