\(\frac{x-35-147}{2016}+\frac{x-147-2016}{35}+\frac{x-2016-35}{147}=3\)
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147 x 91 x 147 x 909
= ( 147 x 91 ) x ( 147 x 909 )
= 13377 x 133623
= 1787474871
2016 x 419 - 2016 x 329
= ( 419 - 329 ) x 2016
= 100 x 2016
= 201600
147 x 91 x 147 x 909
= 13377 x 133623
= 1787474871
2016 x 429 - 2016 x 329
= 2016 x ( 429 - 329 )
= 2016 x 100
= 201600
-25.(35+147)+35.(25+147)
= -25.35 + (-25).147 + 35.25 + 35.147
= 35.(-25+25) + 147.(-25+35)
= 35.0 + 147.10
= 0+1470
=1470
Ta có: 14 + 7+ (x + 35) = 30
<=> 21 + x + 35 = 30
=> x + 35 = 30 - 21
=> x + 35 = 9
=> x = 9 - 35
=> x = -26
=-25 . 35 - 25 . 147 + 35 . 25 + 35 . 147
=-25 . 35 + 35 . 25 + 35 . 147 - 25 . 147
= 0 + 147 (35-25)
=0 + 147 . 10
= 0 + 1470= 1470
-25.(35 + 147) + 35.(25 + 147)
= -25.182 + 35.172
= -25.(10 + 172) + 37.172
= -25.10 + (-25).172 + 37.172
= -250 + 172.( -25 + 37)
=-250 + 172. 12
=-250 + 2064
=1814
d)\(\frac{x+2}{327}+\frac{x+3}{326}+\frac{x+4}{325}+\frac{x+5}{324}=-4\)
\(\Rightarrow\frac{x+2}{327}+1+\frac{x+3}{326}+1+\frac{x+4}{325}+1+\frac{x+5}{324}+\frac{4\left(x+329\right)}{\left(x+329\right)}=0\)
\(\Rightarrow\frac{x+329}{327}+\frac{x+329}{326}+\frac{x+329}{325}+\frac{x+329}{324}+\frac{x+329}{\frac{1}{4}\cdot\left(x+329\right)}=0\)
\(\Rightarrow\left(x+329\right)\left(\frac{1}{327}+\frac{1}{326}+\frac{1}{325}+\frac{1}{324}+\frac{1}{\frac{1}{4}\left(x+329\right)}\right)=0\)
\(\Rightarrow x+329=0\).Do \(\frac{1}{327}+\frac{1}{326}+\frac{1}{325}+\frac{1}{324}+\frac{1}{\frac{1}{4}\left(x+329\right)}\ne0\)
=>x=-329
e)bn kiểm tra lại đề
a) \(x\left(x-2016\right)+2015\left(2016-x\right)=0\)
\(x\left(x-2016\right)-2015\left(x-2016\right)=0\)
\(\left(x-2015\right)\left(x-2016\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-2015=0\\x-2016=0\end{cases}\Rightarrow\orbr{\begin{cases}x=2015\\x=2016\end{cases}}}\)
Vậy x= 2015 và x= 2016
b) \(-5x\left(x-15\right)+\left(15-x\right)=0\)
\(-5x\left(x-15\right)-\left(x-15\right)=0\)
\(\left(-5x-1\right)\left(x-15\right)=0\)
\(\Rightarrow\orbr{\begin{cases}-5x-1=0\\x-15=0\end{cases}\Rightarrow\orbr{\begin{cases}-5x=1\\x=15\end{cases}\Rightarrow}\orbr{\begin{cases}x=-\frac{1}{5}\\x=15\end{cases}}}\)
Vậy x= -1/5 và x= 15
d) \(\frac{x+2}{327}+\frac{x+3}{326}+\frac{x+4}{325}+\frac{x+5}{324}=-4\)
900 + (-100) mà lại bằng -1000 phải bằng 800 chứ