Question

3(x-2)-4x+5=2(2x+1)-18

 

Answer 1

`3(x-2)-4x+5=2(2x+1)-18`

`<=>3x-6-4x+5=4x+2-18`

`<=>3x-4x-4x=2-18+6-5`

`<=>-5x=-15`

`<=>x=3`

Answer 2

`3(x-2)-4x+5=2(2x+1)-18`

`<=> 3x-6 -4x+5=4x+2-18`

`<=>-x -1 - 4x -2+18=0`

`<=> -5x +15=0`

`<=>-5x=-15`

`<=>x=3`

 

Answer 3

3(x-2)-4x+5=2(2x+1)-18

⇔3x-6-4x+5=4x+2-18

⇔3x-4x-4x=2-18+6-5

⇔-5x=-15

⇔x=3

Answer 4

\(3\left(x-2\right)-4x+5=2\left(2x+1\right)-18\)

\(\Leftrightarrow3x-6-4x+5=4x+2-18\)

\(\Leftrightarrow-x-1=4x-16\)

\(\Leftrightarrow-x-1-4x+16=0\)

\(\Leftrightarrow-5x+15=0\)

\(\Leftrightarrow-5x=-15\)

\(\Leftrightarrow x=3\)

\(\text{Vậy phương trình có tập nghiệm là }S=\left\{3\right\}\)