Question

Tìm số nguyên x , biết :

2x+12=3(x-7) 

Answer 1

\(2x+12=3\left(x-7\right)\)

\(\Leftrightarrow2x+12=3x-21\)

\(\Leftrightarrow12+21=3x-2x\)

\(\Leftrightarrow x=33\)

Answer 2

=> 2x+12 = 3x-21

=> 2x = 3x-21-12 = 3x-33

=> 33 = 3x-2x

=> x=33

Vậy x = 33

Tk mk nha

Answer 3

2x+12=3x-21

12+21=3x-2x

Answer 4

2x + 12 = 3( x - 7 )

<=> 2x + 12 = 3x - 21

<=> 12 + 21 = 3x - 2x

=>      33 = x

Vậy x = 33

Answer 5

2x+12=3(x-7) 2x+12=3x-21 2x+12-3x+21=0 (2x-3x)+(12+21)=0 -x+33=0 -x=-33 x=33 Vậy x=33