
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.


a)4.(x+3)-(2x-12)=x-(-11+4)
4x+12-2x+12=x+11-4
2x+24=x+7
2x-x=-24+7
x=-17
b)-(4x-13)+(5x-4)=-3-(-15+7)
-4x+13+5x-4=-3+15-7
(-4x+5x)+13-4=12-7
x+9=5
x=-4
c)(5x-3)-(-2x+4)=6x-12
5x-3+2x-4=6x-12
5x+2x-6x=3+4-12
x=-5
d)(15x+20)-(9x-3)=5x-(-12)
15x+20-9x+3=5x+12
15x-9x-5x=-20-3+12
x=-11
e,(7x+14)+(3x-8)=-(-9x+3)
7x+14+3x-8=9x-3
7x+3x-9x=-14+8-3
x=-9

18x -19 = 21 + 8x
18 x - 8x = 21 + 19
10 x = 40
x =4
g) 18 -4x=-20-6x
-4x + 6x = -20 - 18
2x = -38
x= -19
k, -10 \(x\) - 27 = -7\(x\) + 33
-27 - 33 = -7\(x\) + 10\(x\)
3\(x\) = -60
\(x\) - 20
m, -17\(x\) - 24 = -9\(x\) - 40
-24 + 40 = -9\(x\) + 17\(x\)
8\(x\) = 16
\(x\) = 2

a) ( 2x - 3 ) - ( x - 5 ) = ( x + 7 ) - ( x + 2 )
<=> 2x - 3 - x + 5 = x + 7 - x - 2
<=> x = 3
b)(7x-5)-(6x+4)=(2x+3)-(2x+1)
<=> 7x - 5 - 6x - 4 = 2x + 3 - 2x - 1
<=> x = 11
c)(9x-3)-(8x+5)=(3x+2)
<=> 9x - 3 - 8x - 5 = 3x + 2
<=> -2x = 10
<=> x = -5
d)(x+7)-(2x+3)=(3x+5)-(2x+4)
<=> x + 7 - 2x - 3 = 3x + 5 - 2x - 4
<=> -2x = -3
<=> x = 3/2
ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠᅠ ᅠ

18 - 4\(x\) = -20 - 6\(x\)
-4\(x\) + 6\(x\) = - 20 - 18
2\(x\) = - 38
\(x\) = - 19
h, -15 \(\times\) 24 = -7\(x\) + 32
7\(x\) = 360 + 32
7\(x\) = 392
\(x\) = 392:7
\(x\) = 56
i, 15\(x\) -3.(4\(x\) - 6) = -12 + 36
15\(x\) - 12\(x\) + 18 = 24
3\(x\) = 24 - 18
3\(x\) = 6
\(x\) = 2
k, -10\(x\) - 27 = -7\(x\) + 33
-27 - 33 = -7\(x\) + 10\(x\)
3\(x\) = -60
\(x\) = -20

\(2\left(5-x\right)+5=1-3x\)
\(10-2x+5=1-3x\)
\(-2x+3x=1-10-5\)
\(x=-14\)
Ta có: \(2\left(5-x\right)+5=1-3x\Leftrightarrow10-2x+5=1-3x\Leftrightarrow15=1-x\Leftrightarrow x=-14\)
Vậy \(x=-14\)

2: 12-10x=25-30x
=>20x=13
=>x=13/20
3: \(3\left(2x+3\right)-2\left(4x-5\right)=10x+21\)
=>6x+9-8x+10=10x+21
=>10x+21=-2x+19
=>12x=-2
=>x=-1/6
4: \(\Leftrightarrow25x-15-6x+12=11-5x\)
=>19x-3=11-5x
=>24x=14
=>x=7/12
5: \(\Leftrightarrow8-12x-5+10x=4-6x\)
=>4-6x=-2x+3
=>-4x=-1
=>x=1/4
6: \(\Leftrightarrow32x-24-6+9x=13-40x\)
=>41x-30=13-40x
=>81x=43
=>x=43/81
7: \(\Leftrightarrow10x-5+20x=5x-11\)
=>30x-5=5x-11
=>25x=-6
=>x=-6/25

\(15x-9x+2x=72\)
\(\Rightarrow x\left(15-9+2\right)=72\)
\(\Rightarrow x.8=72\)
\(\Rightarrow x=72:8\)
\(\Rightarrow x=9\)

(7*x-11)^3 = 2^5 * 5^2 +200
(7*x-11)^3 = 32*25+200
(7*x-11)^3=800+200
(7*x-11)^3=1000
=>(7*x-11)^3=(1000)^3
7*x-11=1000
7x=1000+11
7x=1011
x=1011/7
(7.x-11)^3=2^5.5^2+200
(7.x-11)^3=32.25+200
(7.x-11)^3=800+200
(7.x-11)^3=1000
(7.x-11)^3=10^3
7x-11=10
7x=10+11
7x=21
x=21/7
x=3

B(-5) = { - 20 ; - 50 ; 10 }
Ư(-10 ) = { - 1 ; 1 ; -2 ; 2 ; 5 ; - 5 ; - 10 ; 10 }
15x = - 75
x = - 75 : 15 = -5
3x = 18
x = 18 : 3 = 6
-11x = - 22
x = - 22 : ( - 11 ) = 2
Ba bội của -5: 15;5;-5
Ước của -10 là: 1;-1;2;-2;5;-5;10;-10
15x = -75
=> x = -75 : 15 = -5
3x = 18
=> x = 18 : 3 = 6
-11x = -22
=> x = -22 : (-11) = 2
a) 30x-3x = 5 . 54
=> 27x = 270
=> x = 10
b) 15x-9x + 2x = 7
=> 8x = 7
\(\Rightarrow x=\dfrac{7}{8}\)
30x - 3x = 5 . 54
= x . ( 30 - 3 ) = 270
= x .27 = 270
= x = 270 : 27
= x = 10
15x - 9x + 2x = 7
= x . ( 15 - 9 + 2 ) = 7
= x . 8 = 7
= x = 7/8