c)3(2x-1)-5(x-3)+6(3x-4)=24

<=>6x-3-5x-15+18x-24=24

<=>19x-12=24

<=>19x=36

<=>x=\(\frac{36}{19}\)

d)2x(5-3x)+2x(3x-5)-3(x-7)=3

<=>10x-6x²+6x²-10x-3x-21=3

<=>-3(x-7)=3

<=>21-3x=3

<=>-3x=-18

<=>x=6

đề j thế

nhanh len di

de tim x

1: =>(4x+5):3-11=41

=>(4x+5):3=52

=>4x+5=156

=>4x=151

hay x=151/4

2: \(\Leftrightarrow2^x\cdot\left(2^3+1\right)=144\)

\(\Leftrightarrow2^x=16\)

hay x=4

mx - 2x =3

(m-2)x   =3 = 1.3

+) th1:m-2 = 1

=>     x     = 3

 +)th2:m-2=3

=>         x =1

vậy x=3 hoặc x=1

mx - 2x = 3

x . ( m - 2 ) = 3

Mà 3 là số nguyên tố → 3 = 1 . 3

→ Nếu x = 1 thì m - 2 = 3 ( bạn tự tính m nhé )

→ Nếu x = 3 thì m - 2 = 1 ( bạn tự tính m nhé )

Vậy ........

mx-2x=3

nên x=-1.5

e)(3x-1)(2x+7)-(x+1)(6x-5)=16

=>\(6x^2-2x+21x-7-6x^2-6x+5x+5\)=16

=>18x-2=16

=> 18x=18

=> x=1

b)\(x\left(x+1\right)\left(x+6\right)-x^3=5x\)

=>\(x\left(x+1\right)\left(x+6\right)-x^3-5x=0\)

=> \(x\left(x^2+x+6x+6\right)-x\left(x^2-5\right)=0\)

=>\(x\left[\left(x^2+7x+6\right)-\left(x^2-5\right)\right]=0\)

=> __x=1

     |__7x+1=0=> 7x=-1=> x=-1/7

(4-5x)^3=-1/125

<=> 4-5x = -1/5

<=> -5x = -1/5 -4

<=> -5x = -21/5

<=> x = 21/25

Thank you