Question

Tìm x biết 

2(x-5)-3(x+7)=14

Answer 1

2(x - 5) - 3(x + 7) = 14

=> 2x - 10 - 3x - 21 = 14

=> -x - 31 = 14

=> -x = 14 +  31

=> -x = 45

=> x = -45

Answer 2

      2(x-5)-3(x+7)=14

<=> 2x-10-3x-21=14

<=>-x-31=14

-x=31+14

-x=45 ( vô lí ) 

Answer 3

Ta có:

\(2\left(x-5\right)-3\left(x+7\right)=14\)

\(\Leftrightarrow2x-10-3x-21-14=0\)

\(\Leftrightarrow-x-45=0\)

\(\Leftrightarrow x=-45\)