(3x-2^4).7^3=2.7^4
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(3x-24) . 73 = 2.74
(3x-16). 343 = 148
3x - 16 =148: 343
3x - 16 = \(\frac{148}{343}\)
3x = \(\frac{148}{343}\) +16
3x =\(\frac{4036}{343}\)
x = \(\frac{4036}{343}\) : 3
x = \(\frac{4036}{1029}\)
Vậy x = \(\frac{4036}{1029}\)
(3x-24).73=2.74
=>3x-16=2.74:73
=>3x-16=2.7
=>3x=16+14
=>x=30:3
=>x=10
Vậy x=10
a) \(58+7x=100\)
\(=>7x=100-58\)
\(=>7x=42\)
\(=>x=42:7\)
\(=>x=6\)
b) \(3x-7=28\)
\(=>3x=28+7\)
\(=>3x=35\)
\(=>x=35:3\)
\(=>x=\dfrac{35}{3}\)
c) \(x-56:4=16\)
\(=>x-14=16\)
\(=>x=16+14\)
\(=>x=30\)
d) \(101+\left(36-4x\right)=105\)
\(=>36-4x=105-101\)
\(=>36-4x=4\)
\(=>4x=36-4\)
\(=>4x=32\)
\(=>x=32:4\)
\(=>x=8\)
e) \(\left(x-12\right):12=12\)
\(=>x-12=12.12\)
\(=>x-12=144\)
\(=>x=144-12\)
\(=>x=132\)
f) \(\left(3x-2^4\right).7^3=2.7^4\)
\(=>3x-2^4=2.7^4:7^3\)
\(=>3x-16=2.7=14\)
\(=>3x=14+16\)
\(=>3x=30\)
\(=>x=30:3\)
\(=>x=10\)
i) \(\left(10+2x\right).4^{2011}=4^{2013}\)
\(=>10+2x=4^{2013}:4^{2011}\)
\(=>10+2x=4^2=16\)
\(=>2x=16-10\)
\(=>2x=6\)
\(=>x=6:2\)
\(=>x=3\)
\(#WendyDang\)
giúp mik với . càng nhanh càng tốt nha . mik sắp phải nộp bài rùi
\(\left(5x-2^4\right)\cdot7^3=2\cdot74\)
\(\Leftrightarrow\left(5x-16\right)\cdot343=148\)
\(\Leftrightarrow5x-16=\frac{148}{343}\)
\(\Leftrightarrow5x=\frac{148}{343}+16\)
\(\Leftrightarrow5x=\frac{5636}{343}\)
\(\Leftrightarrow x=\frac{5636}{1715}\)
Vậy x=\(\frac{5636}{1715}\)
\(a,\Rightarrow x=3\\ b,\Rightarrow2x-1=2\Rightarrow x=\dfrac{3}{2}\\ c,\Rightarrow\left[{}\begin{matrix}x-2=4\\x-2=-4\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=6\\x=-2\end{matrix}\right.\\ d,\Rightarrow\left[{}\begin{matrix}2x-3=3\\2x-3=-3\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=3\\x=0\end{matrix}\right.\\ e,\Rightarrow2x+5=3^2=9\Rightarrow x=2\)
\(\left(3x-2^4\right).7^3=2.7^4\\ \Leftrightarrow3x-16=2.7^4:7^3\\ \Leftrightarrow3x=14+16\\ \Leftrightarrow3x=30\\ \Leftrightarrow x=10\)
Vậy...
\(\left(2x-2^4\right).7^3=2.7^4\)
\(\Leftrightarrow\left(2x-2^4\right)=2.7^4:7^3\)
\(\Leftrightarrow2x-2^4=2.7\)
\(\Leftrightarrow2x-16=14\)
\(\Leftrightarrow2x=30\)
\(\Leftrightarrow x=15\)
Vậy ..