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

Toán Lớp 6: Tìm số tự nhiên x, biết. a) 70 – 5.(x – 3) = 45 b) 12 + (5 + x) = 20 c) 14x + 54 = 82

Tháng Tư 6, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: Tìm số tự nhiên x, biết.
a) 70 – 5.(x – 3) = 45
b) 12 + (5 + x) = 20
c) 14x + 54 = 82
d) 130 – (100 + x) = 25
e) 15x – 133 = 17
f) 175 + (30 – x) = 200
g) 155 – 10.(x + 1) = 55
h) 5.(x + 12) + 22 = 92
i) 6.(x + 23 ) + 40 = 100
k) 95 – 5.(x + 2) = 45
m) 10 + 2x = 45 : 43
n) 22.(x + 32 ) – 5 = 55
giúp mình với ạ

Comments ( 2 )

  1. huongtructram
    huongtructram
    6 Tháng Tư, 2022 at 5:33 chiều
    Reply

    a) x=6
    b) x=3
    c) x=2
    d) x=5
    e) x=10
    f) x=5
    g) x=9
    h) x=2
    i) x=-13
    k) x=8
    m) x=-4.477
    n) x=-29.27

  2. dongoclandiem
    dongoclandiem
    6 Tháng Tư, 2022 at 5:33 chiều
    Reply
    Giải đáp+Lời giải và giải thích chi tiết:
    a) $70 – 5.(x – 3) = 45$
    $5.(x-3)=70-45=25$
    $x-3=25:5=5$
    $x=5+3=8$
    b) $12 + (5 + x) = 20$
    $5+x=20-12=8$
    $x=8-5=3$
    c) $14x + 54 = 82$
    $14x=82-54=28$
    $x=28:14=2$
    d) $130 – (100 + x) = 25$
    $100+x=130-25=105$
    $x=105-100=5$
    e) $15x – 133 = 17$
    $15x=17+133=150$
    $x=150:15=10$
    f) $175 + (30 – x) = 200$
    $30-x=200-175=25$
    $x=30-25=5$
    g) $155 – 10.(x + 1) = 55$
    $10.(x+1)=155-55=100$
    $x+1=100:10=10$
    $x=10-1=9$
    h) $5.(x + 12) + 22 = 92$
    $5.(x+12)=92-22=70$
    $x+12=70:5=14$
    $x=14-12=2$
    i) $6.(x + 23 ) + 40 = 100$
    $6.(x+23)=100-40=60$
    $x+23=60:6=10$
    $x=10-23=-13$
    k) $95 – 5.(x + 2) = 45$
    $5.(x+2)=95-45=50$
    $x+2=50:5=10$
    $x=10-2=8$
    m) $10 + 2x = 45 : 43$
    $2x=(45:43)-10=\frac{-385}{43}$
    $x=\frac{-385}{43}:2$
    $x=\frac{-385}{86}$
    n) $22.(x + 32 ) – 5 = 55$
    $22.(x+32)=55+5=60$
    $x+32=60:22=\frac{30}{11}$
    $x=\frac{30}{11}-32$
    $x=\frac{-322}{11}$
    $#Lacmei2D$

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

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