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a, \(\frac{3}{8}=\frac{6}{x}\Rightarrow3x=6.8\Rightarrow3x=48\Rightarrow x=\frac{48}{3}=16\)
b, \(\frac{1}{8}=\frac{x}{27}\Rightarrow8x=27\Rightarrow x=\frac{27}{8}\)
c, \(\frac{4}{x}=\frac{6}{8}\Rightarrow6x=4.8\Rightarrow6x=32\Rightarrow x=\frac{32}{6}=\frac{16}{3}\)
d, \(\frac{x}{6}=\frac{5}{24}\Rightarrow24x=30\Rightarrow x=\frac{30}{24}=\frac{5}{4}\)
Ta có : \(2\left|x-6\right|=24\)
\(\Leftrightarrow\left|x-6\right|=24\)
\(\Rightarrow\orbr{\begin{cases}x-6=24\\x-6=-24\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=24+6\\x=-24+6\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=30\\x=-18\end{cases}}\)
10(x-7)-8(x+5)=6(-5)+24
(10.x - 10.7) - (8.x + 8.5) = -30 + 24
10.x - 70 - 8.x + 40 = -6
(10.x-8.x) - (70 - 40) = -6
2.x - 30 = -6
2.x = -6 + 30
2.x = 24
x = 24 : 2
x = 12
vậy_____
10( x- 7)- 8( x+ 5)= 6(- 5)+ 24.
( 10x- 70)-( 8x+ 40)=- 30+ 24.
10x- 70- 8x- 40=- 6.
( 10x- 8x)-( 70+ 40)=- 6.
2x- 110=- 6.
2x=- 6+ 110.
2x= 104.
x= 104: 2.
x= 52.
Vậy x= 52.
x.15 + 24 = 14.8 + 2332 : 6
=> x.15 = 112 + 372
=> x.15 = 484
=> x = 484/15
vậy_
\(x.15+24=14.8+2232:6\)
\(x.15+24=112+372\)
\(x.15+24=484\)
\(x.15=460\)
\(x=460:15=\frac{92}{3}\)
a -7.(5-x) -2.(x-10)=15
= -35+7x-2x+20=15=5x=30
5x=30
x=6
b 10.(x-7)-8.(x+5)=6.(-5)+24
=10x-70-8x-40= -30+24
=10x-8x = -30+24+70+40
2x = 104
x = 104:2
x = 52
\(a)-7\left(5-x\right)-2\left(x-10\right)=15\)
\(\Rightarrow-35+7x-2x+20=15\)
\(\Rightarrow-35+20+7x-2x=15\)
\(\Rightarrow-15+5x=15\)
\(\Rightarrow5x=30\Rightarrow x=6\)
\(b)10\left(x-7\right)-8\left(x+5\right)=6\left(-5\right)+24\)
\(\Rightarrow10x-70-8x-40=-30+24\)
\(\Rightarrow10x-8x-70-40=-6\)
\(\Rightarrow2x-110=-6\)
\(\Rightarrow2x=104\Rightarrow x=52\)
Vậy\(a)x=6b)x=52\)
Tìm x εIN biết
a) 390 - (x-8) = 168:13
b) (x-140) : 7 = 27 - 24
c) x- 6 :2 - ( 48 - 24 ) :2 :6 - 3 = 0
d) x+5.2-(32+16.3:6-15)=0
b) \(\left(x-140\right):7=27-24\)
\(\left(x-140\right):7=3\)
\(x-140=21\)
\(x=161\)
vay \(x=161\)
c) \(x-6:2-\left(48-24\right):2:6-3=0\)
\(x-3-24:2:6-3=0\)
\(x-3-2-3=0\)
\(x-8=0\)
\(x=8\)
vay \(x=8\)
d) \(x+5.2-\left(32+16.3:6-15\right)=0\)
\(x+10-\left(32+8-15\right)=0\)
\(x+10-25=0\)
\(x-15=0\)
\(x=15\)
vay \(x=15\)
a) \(390-\left(x-8\right)=168:13\)
\(390-x+8=\frac{168}{13}\)
\(x+8=390-\frac{168}{13}\)
\(x+8=\frac{5070}{13}-\frac{168}{13}\)
\(x+8=\frac{4902}{13}\)
\(x=\frac{4902}{13}-8\)
\(x=\frac{4798}{13}\)
vay \(x=\frac{4798}{13}\)
\(\left(28.15-34.12\right)x:6+8=24\)
\(12x:6+8=24\)
\(12x:6=32\)
\(12x=192\)
\(x=16\)