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A) \(y=5X-\frac{18.2}{18}=135X-2=13x=3\)
B)\(y=\frac{5x-36}{18}=13\frac{5x}{18}-2=13\frac{5x}{18}=15\frac{x}{18}=3x=54\)
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(36 x 15 x 169):(5 x 18 x 13)
= (18 x 2 x 3 x 5 x 13 x 13):(5 x 18 x 13)
= 2x3x13x(5 x 18 x 13):(5 x 18 x 13)
= 2 x 3 x 13
= 78
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13/36-5/18-x=-11/9
5/18-x=13/36-(-11/9)
5/18-x=19/12
x=5/18-19/12
x= -47/36
vậy x = -47/36
\(\frac{13}{36}-\frac{5}{18}-x=\frac{-11}{9}\)
\(\Leftrightarrow\)\(\frac{13}{36}-\frac{10}{36}-x=\frac{-44}{36}\)
\(\Leftrightarrow\frac{3}{36}-x=\frac{-44}{36}\)
\(\Leftrightarrow x=\frac{3}{36}-\frac{-44}{36}\)
\(\Leftrightarrow x=\frac{47}{36}\)
chắc là vậy
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a) 5x – 36 : 18 = 13
5x – 2 = 13
5x = 13+2
5x = 15
x = 15 :5
x = 3
Vậy x = 3
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c) (5x – 36) : 18 = 13
(5x – 36) = 13.18
(5x – 36) = 234
5x = 234 + 36
5x = 270
x = 270:5
x = 54
Vậy x = 54
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a) (x – 45).27 = 0 ó x – 45 = 0 ó x = 45
b) 41.(2x – 8).13 = 0 ó 2x – 8 = 0 ó x = 4
c) (x – 36):18 = 12 ó x – 36 = 12.18 ó x = 216 + 36 ó x = 252
d) 43.(x – 18) = 86 ó x – 18 = 86:43 ó x = 2+18 ó x = 20
e) 96 : (121 – x) = 4 ó 121 – x = 96 : 4 ó 121 – x = 24 ó x = 121 – 24 ó x = 97
f) 340 : (15x+5) = 17 ó 15x + 15 = 340 :17 ó 15x + 5 = 20 ó 15x = 20 – 5 ó 15x = 15 ó x = 1
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Bài 1:
a. A = 125 . (-61) . (-2)3 . (-1)24
= 125. (-8). (-61) . 124
= 125. 8. 61.1
= 1000. 61 = 61000
b. B = 136. (-47) + 36.47
= (-136).47 + 36.47
= 47. (-136 + 36)
= 47. (-100) = -4700
c. C = (-48).72 + 36.(-304)
= (-96).36 + 36. (-304)
= 36. (-96-304)
= 36. (-400) = -14400
d. D = 87.(13-18) - 13.(87 + 18)
= 87.13 - 87.18 - 13.87 - 13.18
= - 87.18 - 18.13
= - 18.(87+13)
= - 18.100 = -1800
Bài 2:
a. TH1: x - 2 = 0 => x = 2
TH2: 5-x = 0 => x = 5
b. |x| = 56 - 23 = 33 => x = cộng trừ 33
c. 3 - (17-x) = 289 - (36 + 289)
=> 3 - 17 + x = 289 - 289 - 36
=> -14 + x = -36
=> x = -36 - (-14) = -22
1.
a. A = 125 . (-61) . (-2)3 . (-1)24
= 125.(-61).(-8).1
= (-8.125).(-61)
= -1000.(-61)
= 61000
b. B = 136 . (-47) + 36 . 47
=-136.47+36.47
=47(-136+36)
= 47.(-100)
= -4700
2.
a. (x - 2) . (5 - x) = 0
=> x - 2 = 0 hoặc 5 - x = 0
=> x = 2 hoặc x = 5
b. 56 - lxl = 23
=> |x| = 33
=> x = 33 hoặc x = -33
c. 3 - (17 - x) = 289 - (36 + 289)
=> 3 - 17 + x = 289 - 36 - 289
=> -14 + x = -36
=> x = -22