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6-10x76+5x11x12+4x14x15-230
=6-760+660+840-230
= -754+660+840-230
= -94+840-230
=746-230
=516
![](https://rs.olm.vn/images/avt/0.png?1311)
\(60+x-34=43\Rightarrow x=43+34-60=17\)
\(23x-6.23+69x=230\)
\(\Rightarrow23x+69x=230+6.23\)
\(\Rightarrow92x=368\Rightarrow x=368:92\Rightarrow x=4\)
\(\left(15.24-x\right):0,25=100:0,25\)
\(\Rightarrow\left(360-x\right)=100:0,25.0,25\)
\(\Rightarrow360-x=100\Rightarrow x=360-100=260\)
\(\left(7x+8\right):5=10\Rightarrow\left(7x+8\right)=10.5\)
\(\Rightarrow7x+8=50\Rightarrow7x=50-8\Rightarrow7x=42\Rightarrow x=42:7=6\)
\(280:\left(7+3x\right)=4\Rightarrow\left(7+3x\right)=280:4\)
\(\Rightarrow7+3x=70\Rightarrow3x=70-7\Rightarrow3x=63\Rightarrow x=63:3=21\)
\(\left(x+5\right)x19:13=57\)
\(\Rightarrow\left(x+5\right)x19=57.13\)
\(\Rightarrow\left(x+5\right)=741:19\Rightarrow x+5=39\Rightarrow x=39-5=34\)
\(4\left(36-4x\right)=64\)
\(\Rightarrow\left(36-4x\right)=64:4\)
\(\Rightarrow36-4x=16\)
\(\Rightarrow4x=36-16\Rightarrow4x=20\Rightarrow x=20:4=5\)
\(\left(7,6:1,9\right)x=3,2\)
\(\Rightarrow4x=3,2\Rightarrow x=3,2:4=0,8\)
\(\left(x:2+50\right):5=12\)
\(\Rightarrow x:2+50=12.5\)
\(\Rightarrow x:2=60-50\Rightarrow x:2=10\Rightarrow x=10.2=20\)
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a) \(\Rightarrow5\left(x-10\right)=10\)
\(\Rightarrow x-10=2\Rightarrow x=12\)
b) \(\Rightarrow3\left(70-x\right)+5=92\)
\(\Rightarrow3\left(70-x\right)=87\)
\(\Rightarrow70-x=29\Rightarrow x=41\)
c) \(\Rightarrow230+\left[16+\left(x-5\right)\right]=315\)
\(\Rightarrow11+x=85\Rightarrow x=74\)
d) \(\Rightarrow707:\left(2^x-5+74\right)=7\)
\(\Rightarrow2^x-5+74=101\Rightarrow2^x-5=27\)
\(\Rightarrow2^x=32\Rightarrow x=5\)
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ta có 10^230=1000.....00(230 số 0)
230^1=230
-> 10^230 + 230^1=10^230=1000.....00(230 số 0) + 230=1 000...0(227 số 0) 230
vì số trên có tận cùng là 0 nên chia hết cho 2
tống các chữ số của số trên là
1+0+0+...+0(227 số 0)+2+3+0=6 vì 6 chia hết cho 3 nên số trên chia hết cho 3 nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{52}{33}-x:\frac{11}{84}=\frac{10}{33}\)
\(\Leftrightarrow x:\frac{11}{84}=\frac{52}{33}-\frac{10}{33}=\frac{14}{11}\)
\(\Leftrightarrow x=\frac{14}{11}.\frac{11}{84}=\frac{1}{6}\)
~ Hok tốt ~
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\(-(35-x)-(37-x)=33\\\Rightarrow-35+x-37+x=33\\\Rightarrow(-35-37)+(x+x)=33\\\Rightarrow-72+2x=33\\\Rightarrow2x=33+72\\\Rightarrow2x=105\\\Rightarrow x=105:2\\\Rightarrow x=52,5\\---\)
\((-14)+x-7=(-10)\\\Rightarrow x-7=(-10)+14\\\Rightarrow x-7=4\\\Rightarrow x=4+7\\\Rightarrow x=11\)
TL:
230 : {33 -x}=10
=> 230 = 10 (33-x)
=> 23 = 33-x
=> x = 33-23
X=10
230 : ( 33 - x ) = 10
33 - x = 230 : 10
33 - x = 23
x = 33 - 23
x = 10