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

Toán Lớp 6: 3 tìm x d, 18 – x = – 8 -(-13) e, -x + 53 = 14 – 37 f, 45 – ( x + 17) = – 26

Toán Lớp 6: 3 tìm x
d, 18 – x = – 8 -(-13)
e, -x + 53 = 14 – 37
f, 45 – ( x + 17) = – 26

Comments ( 2 )

  1. d, 18 – x = – 8 -(-13)  
        18 – x = 5
               x  = 18 – 5
               x = 13
    e, -x + 53 = 14 – 37
        -x + 53 = -23
        -x         = -23 – 53
        -x         = -76
    f, 45 – ( x + 17) = – 26
               x + 17   = -26 + 45
               x + 17   = 19
               x            = 19 – 17
               x            = 2
    Chúc bạn học tốt ^^

  2. d, 18 – x = – 8 -(-13)
    18 – x =-8 + 13
    18 – x = + 5
            x = 18 – 5 
            x = 15
    e, -x + 53 = 14 – 37
    -x + 53 = – 23
    -x = -23 + 53
    -x = + 30 
    x= -30 
    f, 45 – ( x + 17) = – 26
    x+ 17 = -26 + 45
    x+17 = + 19 
    x= +19-17
    x= +2

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