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

Toán Lớp 6: 1) x + 2.7 − 6 = 2 mũ 3 2) 24. (3 x − 16) = 48 3) 168 − (18 − 2 x). 12 = 120 4) [(10 − x). 2 + 5]: 3 − 2 = 3 5) 2 mũ 2. 2 mũ x = 128 6)

Toán Lớp 6: 1) x + 2.7 − 6 = 2 mũ 3
2) 24. (3 x − 16) = 48
3) 168 − (18 − 2 x). 12 = 120
4) [(10 − x). 2 + 5]: 3 − 2 = 3
5) 2 mũ 2. 2 mũ x = 128
6) (x + 3) mũ 3 = 64

Comments ( 2 )

  1. 1)x+2.7-6=2^3
    x+2.7=8+6
    x+2.7=14
    x+2=14:7
    x+2=2
    x=2-2
    x=0
    2)24.(3x-16)=48
    3x-16=48:24
    3x-16=2
    3x=2+16
    3x=18
    x=18:3
    x=6
    3)168-(18-2x).12=120
    (18-2x).12=168-120
    (18-2x).12=48
    18-2x=48:12
    18-2x=4
    2x=18-4
    2x=14
    x=14:2
    x=7
    4) [(10 − x). 2 + 5]: 3 − 2 = 3
    [(10 − x). 2 + 5]: 3=3+2
    [(10-x).2+5 ]:3=5
    (10-x).2+5=5.3
    (10-x).2+5=15
    (10-x).2=15-5
    (10-x).2=10
    10-x=10:2
    10-x=5
    x=10-5
    x=5
    5)2^2.2^x=128
    2^2.2^x=2^7
    2^x=2^7:2^2
    2^x=2^5
    vì 2=2
    nên x cũng bằng 5
    vậy x=5
    6)(x+3)³=64
    (x+3)³=4³
    x+3=4
    x=4-3
    x=1

  2. Của bạn nè :3
    Chúc bạn học tốt !!!
    Cho mình xin 5 sao và ctlhn nha :>
    #phuonganh260409
    toan-lop-6-1-2-7-6-2-mu-3-2-24-3-16-48-3-168-18-2-12-120-4-10-2-5-3-2-3-5-2-mu-2-2-mu-128-6

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