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

Toán Lớp 7: a, 11/13 – ( 5/42 – x) = -( 15/28 – 11/13) b, | x+4/15| – |-3,75| = -|- 2,15| c, x + 1/3 = 2/5-(-1/3) d, 3/7 – x = 1/4 -(-3/5) e, 2/3x

Toán Lớp 7: a, 11/13 – ( 5/42 – x) = -( 15/28 – 11/13)
b, | x+4/15| – |-3,75| = -|- 2,15|
c, x + 1/3 = 2/5-(-1/3)
d, 3/7 – x = 1/4 -(-3/5)
e, 2/3x + 5/7 = 3/10
f, -21/13x + 1/3 = -2/3
g, |x+3/4|-1/2= 0

Comments ( 1 )

  1. Giải đáp:
    a)11/13-(5/42-x)=-(15/28-11/13)
     =>11/13-5/42+x=-15/28+11/13
     =>x=-15/28+11/13-11/13+5/42
     =>x=-5/12
     Vậy x=-5/12

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

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