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

Toán Lớp 6: -5(2 – x) + 4(x – 3) = 10x – 15

Toán Lớp 6: -5(2 – x) + 4(x – 3) = 10x – 15

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    -5(2 – x) + 4(x – 3) = 10x – 15
    <=> -10 +5x +4x -12 = 10x-15
    <=> 5x+4x-10x= -15 +10 +12
    <=> -x=7
    <=> x=-7
    Vậy x= -7

  2. $\text{ -5 ( 2 – x ) + 4 ( x – 3 ) = 10x -15 }$
    $\text{ ⇒ -10 + 5x + 4x – 12 = 10x -15 }$
    $\text{ ⇒ -10 – 12 + 15 = 10x – 5x – 4x }$
    $\text{ ⇒ -7 = x }$
    $\text{ ⇒ x = -7}$

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

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