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\(6x+x=5^{11}:5^9+3^1\)
\(\Leftrightarrow7x=5^2+3\)
\(\Leftrightarrow7x=28\)
\(\Leftrightarrow x=\frac{28}{4}\)
\(\Leftrightarrow x=7\)
\(5x+2x=6^2+5^0\)
\(\Leftrightarrow7x=36+1\)
\(\Leftrightarrow7x=37\)
\(\Leftrightarrow x=\frac{37}{7}\)
\(6x+x=5^{11}:5^9+3^1\)
\(6x+x=5^{11-9}+3^1\)
\(6x+x=5^2+3^1\)
\(6x+x=25+3\)
\(6x+x=28\)
\(\left(6+1\right).2x=28\)
\(7.2x=28\)
\(2x=28:7\)
\(2x=4\)
\(x=4:2\)\(x=2\)
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\(\Rightarrow7x=5^{11-9}+3\)
\(\Rightarrow7x=5^2+3\)
\(\Rightarrow7x=28\)
\(\Rightarrow x=\frac{28}{7}\)
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a) 6x + x = 511 : 59 + 31
7x = 52 + 3
7x = 25 + 3
7x = 28
x = 28 : 7
x = 4
b) 5x + 3x = 36 : 33 . 4 + 12
8x = 33 . 4 + 12
8x = 27 . 4 + 12
8x = 108 + 12
8x = 120
x = 120 : 8
x = 15
a) \(6x+x=5^{11}:5^9+3^1\)
\(7x=25+3\)
\(7x=28\)
\(x=4\)
b) \(5x+3x=3^6:3^3.4+12\)
\(8x=27.4+12\)
\(8x=108+12\)
\(8x=120\)
\(x=15\)
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a) 2x . 4 = 128
2x = 128 : 4
2x = 32
2x = 25
=> x = 5
b) 2x . 24 = 26
=> x + 4 = 6
x = 6 - 4
x = 2
c) 5x + x = 39 - 311 : 39
6x = 39 - 32
6x = 39 - 9
6x = 30
x = 30 : 6
x = 5
d) 9x - 1 = 81
9x - 1 = 92
=> x - 1 = 2
x = 2 + 1
x = 3
e) 6x = 521 : 519 + 3 . 22 - 70
6x = 52 + 3 . 4 - 1
6x = 25 + 12 - 1
6x = 37 - 1
6x = 36
x = 36 : 6
x = 6
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Các bạn ơi,mình ghi thiếu,còn 3 câu nữa nha!!!~~nya
e)| \(\dfrac{5}{2}\)x-\(\dfrac{1}{2}\) |-(-22).\(\dfrac{1}{3}\)(0,75-\(\dfrac{1}{7}\))=\(\dfrac{-5}{13}\):2\(\dfrac{9}{13}\)-0,5.(\(\dfrac{-2}{3}\))
f)| 5x+21 | = | 2x -63 |
g) -45 - |-3x-96 | - 54=-207
Làm ơn giúp mình với ạ!Mình đang cần gấp lắm trong ngày hôm nay ạ!!!Mình xin cảm ơn các bạn nhiều nhiều lắm luôn đó!!!Thank you very much!!!(^-^)
a, (\(\dfrac{2}{9}\)(6x - \(\dfrac{3}{4}\)) - 3(\(\dfrac{1}{4}x-\dfrac{1}{5}\)) = \(\dfrac{-8}{15}\)
<=> (\(\dfrac{4}{3}x-\dfrac{1}{6}\)) - (\(\dfrac{3}{4}x-\dfrac{3}{5}\)) = \(\dfrac{-8}{15}\)
<=> \(\dfrac{4}{3}x-\dfrac{1}{6}-\dfrac{3}{4}x+\dfrac{3}{5}=\dfrac{-8}{15}\)
<=> \(\dfrac{7}{12}x+\dfrac{13}{30}=\dfrac{-8}{15}\)
<=> \(\dfrac{7}{12}x=\dfrac{-8}{15}-\dfrac{13}{30}\)
<=> \(\dfrac{7}{12}x=-\dfrac{29}{30}\)
<=> x = \(-\dfrac{58}{35}\)
@Nguyễn Gia Hân
6x + x = 511 : 59 + 31
x . ( 6 + 1 ) = 52 + 3
x . 7 = 25 + 3
x . 7 = 28
x = 28 : 7
x = 4
Vậy x = 4
6x+x=511:59+31
7x=25+3
7x=28
x=28:7
x=4
vậy: x=4