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a) \(5x+x=39-3^{11}:3^9\)
\(\Leftrightarrow6x=39-3^2\)
\(\Leftrightarrow6x=30\)
\(\Leftrightarrow x=5\)
b) \(2^x:2^5=16\)
\(\Leftrightarrow2^x:2^5=2^4\)
\(\Leftrightarrow2^x=2^4.2^5\)
\(\Leftrightarrow2^x=2^9\)
\(\Leftrightarrow x=9\)
c) \(7x-x=5^{21}:5^{19}+3.2^2-7^0\)
\(\Leftrightarrow6x=5^2+3.4-1\)
\(\Leftrightarrow6x=36\)
\(\Leftrightarrow x=6\)
d) \(7x-2x=6^{17}:6^{15}+44:11\)
\(\Leftrightarrow5x=6^2+4\)
\(\Leftrightarrow5x=40\)
\(\Leftrightarrow x=8\)
a)⇔6x=39-32
⇔6x=30
⇔ x=5
b)2x:25=16
⇔2x=24.25
⇔ 2x=29
⇔ x=9
c)⇔6x=52+3.22-1
⇔ 6x= 36
⇔ x=6
d)⇔5x=62+4
⇔ 5x=40
⇔ x=8
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5x+x=39-311:39
6x = 29 - 32
6x = 29-9
6x =20
x =\(\frac{10}{3}\)
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\(5x+x=39-3^{101}:3^{99}\)
\(\Rightarrow5x+x=39-9\)
\(6x=30\)
\(x=30:6\)
\(x=5\)
Vậy \(x=5\)
Chúc bạn học tốt !!!
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\(5x+x=39-3^{11}:3^9.\)
\(5x+x=39-9\)
\(5x+x=30\)
\(\Leftrightarrow x.\left(5+1\right)=30\)
\(x.6=30\)
\(\Rightarrow x=5\)
\(5x+x=39-3^{11}:3^9\)
\(6x=39-3^2\)
\(6x=39-9\)
\(6x=30\)
\(x=30:6\)
\(x=5\)
Vậy \(x=5\)
Tham khảo nhé~
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