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\(2\left(x-1\right)+3\left(3x-2\right)=x-4\)
\(2x-2+9x-6=x-4\)
\(2x+9x-x-2-6=-4\)
\(10x-2-6=-4\)
\(10x-2=2\)
\(10x=4\)
\(x=\frac{2}{5}\)
Vậy \(x=\frac{2}{5}\)
\(3\left(4-x\right)-2\left(x-1\right)=x+20\)
\(12-3x-2x+2=x+20\)
\(12-5x+2=x+20\)
\(12-5x-x+2=20\)
\(12-6x+2=20\)
\(12-6x=18\)
\(6x=-6\)
\(x=-1\)
Vậy \(x=-1.\)
\(4\left(2x+7\right)-3\left(3x-2\right)=24\)
\(8x+28-9x+6=24\)
\(8x-9x+28+6=24\)
\(-x+34=24\)
\(-x=-10\)
\(x=10\)
Vậy \(x=10\)
\(3\left(x-2\right)+2x=10\)
\(3x-6+2x=10\)
\(3x+2x-6=10\)
\(5x=16\)
\(x=\frac{16}{5}\)
Vậy \(x=\frac{16}{5}\)
2(x-1)+3(3x-2)=x-4
=>2x-2=9x-6-x+4=0
=>10x-4=0
=>x=\(\frac{2}{5}\)
a:x=3/5-7/8=24/40-35/40=-11/40
b: =>1/3:(2x-1)=-1/6
=>2x-1=-2
=>2x=-1
=>x=-1/2
c: =>x-3/4=17/2+7/4=34/4+7/4=41/4
=>x=11
d: =>3x+2=0 hoặc 2/5x+7=0
=>x=-2/3 hoặc x=-7:2/5=-35/2
a. 4(2x+7)-3(3x-2)=24
=> 8x+28-9x+6=24
=> -x+34=24
=> -x=-10=> x=10
b. 2(x-1)+3(x-2)=x-4
=> 2x-2+3x-6=x-4
=> 5x-8=x-4
=> 5x-x=-4+8
=> 4x=4=> x=1
c. [124-(20-4x)]:30+7=11
=> (124-20+4x):30=4
=> (104+4x):30=4
=> 104+4x=120
=> 4x=96 => x=24
1) 3x = 45 + 15 = 60
x = 60 : 3 = 20
2) 5x = 50 - 35 = 15
x = 15 : 5 = 3
3) (2x - 5) + 17 = 6
2x - 5 = 6 - 17
2x - 5 = -11
2x = -11 + 5
2x = -6
x = -6 : 2 = -3
4) 10 - 2(4 -3x) = -4
2(4 - 3x) = -4 - 10 = -14
4 - 3x = -14 : 2 = -7
3x = -7 - 4 = -18
x = -18 : 3 = -6
\(\left\{{}\begin{matrix}\left\{{}\begin{matrix}3x-15=45\Leftrightarrow3x=60\Leftrightarrow x=20\\35-5x=50\Leftrightarrow5x=-15\Leftrightarrow x=-3\end{matrix}\right.\\\left\{{}\begin{matrix}\left(2x-5\right)+17=6\Leftrightarrow2x+5=-11\Leftrightarrow2x=-16\Leftrightarrow x=-8\\10-2\left(4-3x\right)=-4\Leftrightarrow8-6x=14\Leftrightarrow6x=-6\Leftrightarrow x=-1\end{matrix}\right.\\\left\{{}\begin{matrix}-12+3\left(-x+7\right)=-18\Leftrightarrow-3x+21=-6\Leftrightarrow-3x=-27\Leftrightarrow x=9\\24:\left(3x-2\right)=-3\Leftrightarrow3x-2=-8\Leftrightarrow3x=-6\Leftrightarrow x=-2\end{matrix}\right.\\-45:5\left(-3-2x\right)=3\Leftrightarrow-15-10x=-15\Leftrightarrow10x=0\Leftrightarrow x=0\end{matrix}\right.\)
a)=2
b)=0.3333333333
c)=9
d)= chua tinh
e)=33
g)=5
tk minh nha ban nha
a) (2x-5)+17=16
2x-5=16-17
2x-5=-1
2x=-1+5
2x=4
x=4:2
x=2
b) 10-2.(4-3x)=-4
2.(4-3x)=10--4
2.(4-3x)=14
4-3x=14:2
4-3x=7
3x=4-7
3x=-3
x=-3:3
x=-1
3.(4-x) - 2.(x-1) = x + 20
<=> 12 - 3x - 2x + 2 = x + 20
<=> -6x = 6
<=> x = -1
4.(2x+7) - 3( 3x - 2 ) = 24
<=> 8x + 28 - 9x + 6 = 24
<=> -x = -10
<=> x = 10
3(x-2) + 2x = 10
<=> 3x - 6 + 2x = 10
<=> 5x = 16
<=> x = \(\frac{16}{5}\)
a, 3( 4-x) - 2(x-1) = x + 20
12 - 3x - 2x -2 = x + 20
10 - x = x + 20
=> 2x = 10 -(+20)
2x = 10 - 20
2x = -10
=> x = -10 : 2
=> x = -5
Vậy x = -5
b, 4(2x + 7) - 3(3x - 2) = 24
8x + 28 - 9x -9 = 24
=> -x + 19 = 24
-x = 24 - 19
=> -x = 5
=> x = -5
Vậy x = -5
c, 3(x - 2) + 2x = 10
3x - 6 + 2x = 10
5x - 6 = 10
5x = 10 + 6
5x = 16
=> x = \(\frac{16}{5}\)
Vậy x = \(\frac{16}{5}\)
a) x + 12 = (-5) - x
=> chuyển vế : x + x = -12 - 5
=> 2x = -17
=> x = \(-\frac{17}{2}\)
b) 2 . (x - 1) + 3 . (x-2) = x - 4
=> 2x - 2 + 3x - 6 = x - 4
=> chuyển vế: 2x +3x - x = 2 + 6 - 4
=> 4x = 4 => x = 1
c) 4 . (2x +7) - 3 . (3x-2) = 24
=> 8x + 28 - 9x +6 = 24
=> - x = -28 - 6 + 24
=> x = 10
d) 3 . ( x-2) + 2x = 10 (Ý bạn c là x đúng không?)
=> 3x - 6 + 2x = 10
=> 5x = 6 + 10
=> 5x = 16 => x = \(\frac{16}{5}\)
Đúng thì k mik nha. Thanks!
\(a,x+12=\left(-5\right)-x\)
\(x+x=12-5\)
\(2x=7\Leftrightarrow x=\frac{7}{2}\)
\(b,2\left(x-1\right)+3\left(x-2\right)=x-4\)
\(2x-2+3x-6=x-4\)
\(2x+3x-x=-4+2+6\)
\(4x=4\Leftrightarrow x=1\)
\(c,4\left(2x+7\right)-3\left(3x-2\right)=24\)
\(4x+28-9x+6=24\)
\(4x-9x=24-28-6\)
\(-5x=-10\Leftrightarrow x=2\)
\(d,3\left(x-2\right)+2x=10\)
\(3x-6+2x=10\)
\(3x+2x=10+6\)
\(5x=16\Leftrightarrow x=\frac{16}{5}\)
a) 4(2x+7)-3(3x-2)=24
8x+28-9x-6=24
(8x-9x)+(28-6)=24
(-1)x+22=24
(-1)x=24-22=2
x=2:(-1)=-2
b) -2(x+3)+(-4)2=3(1-x)
(-2)x+(-6)+16=3-3x
(-2)x+(-6)+16+3x=3
[(-2)x+3x]+[(-6)+16]=3
x+10=3
x=3-10=-7