Question

3 (x +4) +2 (x -1) -3=22

giúp tớ nhá!

Answer 1

\(3\left(x+4\right)+2\left(x-1\right)-3=22\)

\(\Leftrightarrow3x+12+2x-2-3=22\)

\(\Leftrightarrow5x-15=0\Leftrightarrow x=3\)

Vậy x = 3 

Answer 2

\(3\left(x+4\right)+2\left(x-1\right)-3=22\)

\(3x+12+2x-2-3=22\)

\(5x-7=22\)

\(5x=22+7\)

\(5x=29\)

\(x=\frac{29}{5}=5,8\)

Answer 3

Trả lời:

\(3.\left(x+4\right)+2.\left(x-1\right)-3=22\)

\(\Leftrightarrow3x+12+2x-2-3=22\)

\(\Leftrightarrow5x+7=22\)

\(\Leftrightarrow5x=15\)

\(\Leftrightarrow x=3\)

Vậy \(x=3\)

Answer 4

\(3\left(x+4\right)+2\left(x-1\right)-3=22\)

\(3x+12+2x-2-3=22\)

\(3x+2x=22+2+3-12\)

\(5x=15\)

\(x=15:5\)

\(x=3\)

Chúc bạn học tốt

Answer 5

3( x + 4 ) + 2( x - 1 ) - 3 = 22

<=> 3x + 12 + 2x - 2 - 3 = 22

<=> 5x + 7 = 22

<=> 5x = 15

<=> x = 3

Answer 6

sửa lại

.......

5x + 7 = 22

5x = 22 - 7

5x = 15

x = 15/5 =3

Answer 7

Trả lời:

\(3\times\left(x+4\right)+2\times\left(x-1\right)-3=22\)

\(3x+12+2x-2-3=22\)

\(5x+7=22\)

\(5x=15\)

\(x=3\)

Vậy \(x=3\)

Answer 8

\(3\left(x+4\right)+2\left(x-1\right)-3=22\)

<=> \(3x+12+2x-2-3=22\)

<=> \(5x=-15\)

<=> \(x=-3\)