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\(\frac{3}{10}\)x \((\frac{-5}{9}+\frac{3}{5})\)\(+\frac{3}{10}x\)\((\frac{-4}{9}+\frac{2}{5})\)= \(\frac{3}{10}x\)\((\frac{-2}{45})\)+ \(\frac{3}{10}x\) \(\times\frac{2}{45}\)= \(\frac{3}{10}x\left(\frac{-2}{45}+\frac{2}{45}\right)\)= \(\frac{3}{10}x\times0\)= 0
Chúc bạn học tốt !
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3x(8^2-2(2^5-1))=2022
=>3x(64-2*31)=2022
=>3x=1011
=>x=337
3x[8² - 2(2⁵ - 1)] = 2022
3x[64 - 2(32 - 1)] = 2022
3x(64 - 2.31) = 2022
3x(64 - 62) = 2022
3x.2 = 2022
6x = 2022
x = 2022 : 6
x = 337
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-2011+|x|=5.16-81
-2011+|x|=80-81
-2011+|x|=-1
|x| =(-1)-(-2011)
|x| =2010
-> x=2010 hoặc x=-2010
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83 - 5 ( x + 4 ) = 28
5 ( x + 4 ) = 83 - 28
5 ( x + 4 ) = 55
x + 4 = 55 : 5
x + 4 = 11
x = 11 - 4
x = 7
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\(4^{x+2}+5.4^x=84\Rightarrow4^x\left(4^2+5\right)=84\Rightarrow4^x=4^1\Rightarrow x=1\)
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A=(19 5/8 : 7/12 - 13 1/4 : 7/12) .4/5
=(19 5/8 - 13 1/4):7/12.4/5
=51/8.12/7.4/5
=153/14.4/5
=306/35
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mủ sao?????
(105 - 10x -4) + 25 = 89968