Question

Tìm x :

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

Answer 1

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

\(\Leftrightarrow3x+6=5x-15-x\)

\(\Leftrightarrow3x-5x+x=-15-6\)

\(\Leftrightarrow-x=-21\)

\(\Leftrightarrow x=21\)

Answer 2

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

\(3x+6=5x-15-x\)

\(3x+6=4x-15\)

\(-1x=-21\)

\(\Rightarrow x=21\)

Answer 3

\(3\left(x+2\right)=5\left(x-3\right)-x\\ \Leftrightarrow3x+6=5x-15-x\\ \Leftrightarrow3x-5x+x=-15-6\\ \Leftrightarrow-x=-21\\ \Rightarrow x=21\)

Answer 4

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

=>3x+6=5x-15-x

=>3x-5x+x=-15-6

=>-x=-21

=>x=21

Vậy x= 21

 

Answer 5

3 ( x - 2 ) = 5 ( x- 2 ) - x

* 3x + 6 = 5x - 15 - x

* 3x - 5x + x = 15 - 6

* - x = - 21

* x = 21

chắc thế!