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

Toán Lớp 6: (-15) . x = -45 (+2) . x = -16 (-15) . x = 10.(-40)-5 (-3) . x = 2.(-7)+4

Toán Lớp 6: (-15) . x = -45
(+2) . x = -16
(-15) . x = 10.(-40)-5
(-3) . x = 2.(-7)+4

Comments ( 2 )

  1. $1)$
    <=> x = ( -45 ) : ( -15)
    => x = 3
    $2)$
    <=> x = ( -16 ) : 2
    => x = -8
    $3)$
    <=> ( -15 ) . x = -405
    <=> x = ( -405 ) : ( -15)
    => x = 27
    $4)$
    <=> ( -3 ) . x = -10
    <=> x = 10 : ( -3)
    => x = -10/3
     

  2. (-15).x= 45
    x= 45:(-15)
    x= -3
    Vậy x= -3
    (+2).x= -16
    x= -16:(+2)
    x= -8
    Vậy x= -8
    (-15).x= 10.(-40)-5
    (-15).x= -400-5
    (-15).x= -405
    x= -405:(-15)27
    Vậy x= 27
    (-3).x= 2.(-7)+4
    (-3).x= -14+4
    (-3).x= -10
    x= -10:(-3)
    x= 10/3
    Vậy x= 10/3
     

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