Question

A. 1/3x + 2/5 (x-1) = 0

B. (2x-3) (6-2x) = 0

C. -2/3 -1/3 (2x-5) = 3/2

Ai làm nhanh đúng mk cho 3tk

 

Answer 1

Giải PT đúng ko cậu !?

Answer 2

a ) 1/3x + 2/5 ( x - 1 ) = 0

1/3x + 2/5x - 2/5 = 0

x . ( 1/3 + 2/5 ) = 2/5

x . 11/15 = 2/5

=> x = 6/11

Vậy x = 6/11

Answer 3

b ) ( 2x - 3 ) ( 6 - 2x ) = 0

=> \(\orbr{\begin{cases}2x-3=0\\6-2x=0\end{cases}}\)

=> \(\orbr{\begin{cases}2x=3\\2x=6\end{cases}}\)=> \(\orbr{\begin{cases}x=\frac{3}{2}\\x=3\end{cases}}\)

Vậy ...

Answer 4

c ) -2/3 - 1/3 ( 2x - 5 ) = 3/2

1/3 . ( 2x - 5 ) = -2/3 - 3/2

1/3 . ( 2x - 5 ) = -13/6

2x - 5 = -13/6 : 1/3

2x - 5 = -13/2

=> 2x = -3/2

=> x = - 3 / 4

Vậy x = -3/4

Answer 5

A=6/11

Answer 6

B=x=(x,y)=(3/2,3)

Answer 7

c=6/11