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2x4 chia hết cho 4 khi x=0; x=2; x=4; x=6; x=8
24x chia hết cho 5 khi x=0; x=5
\(4800:x+\frac{130}{4}+255=7,3\times50\)
\(4800:x+\frac{130}{4}+\frac{255\times4}{4}=365\)
\(4800:x+\frac{130}{4}+\frac{1020}{4}=365\)
\(4800:x+\frac{130+1020}{4}=365\)
\(4800:x+\frac{1150}{4}=365\)
\(4800:x+\frac{575}{2}=365\)
\(4800:x=365-\frac{575}{2}\)
\(4800:x=\frac{365\times2}{2}-\frac{575}{2}\)
\(4800:x=\frac{730}{2}-\frac{575}{2}\)
\(4800:x=\frac{730-575}{2}\)
\(4800:x=\frac{155}{2}\)
\(x=4800:\frac{155}{2}\)
\(x=\frac{1920}{31}\)
Chúc Em Học Tốt !
4800:X+130/4+225=7,3x50\(\Rightarrow\)4800:x+130/4=110\(\Rightarrow\)x=4800:(110-130/4)\(\Rightarrow\)x=1920/31
x04+40x = 100xX +4 + 400 +X = 101xX +404 = 101xX +101x4 =101x (X+4) = 101x11 => X+4 =11 => X =7
\(460+85\times4=\left(x+200\right)\times4\)
\(\left(x+200\right)\times4=460+340\)
\(\left(x+200\right)\times4=800\)
\(x+200=800:4\)
\(x+200=200\)
\(x=200-200\)
\(x=0\)
~~~
\(\left(x-7\right)\left(2x-8\right)=0\)
\(+, TH1: x - 7 = 0\)
\(x=0+7\)
\(x=7\)
\(+, TH2 : 2x - 8 = 0 \)
\(2x=0+8\)
\(2x=8\)
\(x=8:2\)
\(x=4\)
~~~
\(x-280:35=5\times54\)
\(x-8=270\)
\(x=270+8\)
\(x=278\)
~~~
\(324+16\times\left(2x+3\right)=404\)
\(16\times\left(2x+3\right)=404-324\)
\(16\times\left(2x+3\right)=80\)
\(2x+3=80:16\)
\(2x+3=5\)
\(2x=5-3\)
\(2x=2\)
\(x=2:2\)
\(x=1\)
#\(Toru\)
`460 + 85 xx 4 = ( x + 200) xx 4`
`460 + 340 = (x+200)xx4`
` 800= (x+200)xx4`
`x+200=800:4`
`x+200=200`
`x=200-200`
`x=0`
__
`(x-7)(2x-8)=0`
`@ TH1`
`x-7=0`
`x=0+7`
`x=7`
`@ TH2`
`2x-8=0`
`2x=0+8`
`2x=8`
`x=8:2`
`x=4`
__
`x -280 : 35=5xx54`
`x -280 : 35=270`
`x-8=270`
`x=270+8`
`x=278`
__
`324 + 16xx(2x+3)=404`
`16xx(2x+3)=404 -324`
`16xx(2x+3)=80`
`2x+3=80:16`
`2x+3=5`
`2x=5-3`
`2x=2`
`x=2:2`
`x=1`
16x+20x+24x+................+40x+44x=4800
=(16+20+24+.....+40+44)x=4800
=240x=4800
x=20
16x + 20x + 24x + .............. + 40x + 44x = 4800
(16 + 20 + 24 + ..................+ 40 + 44). x = 4800
\(\frac{\left(16+44\right).8}{2}\). x = 4800
240 . x = 4800
x = 4800 : 240
x = 20
đáp số: 20