Question

`\sf 2x+21=3`




Free

Answer 1

`\bf x=-9`

Explanation:

`\sf 2x+21=3`

Subtract 21 from both sides:-

`\sf 2x+21-21=3-21`

Simplify

`\sf 2x=-18`

Divide both sides by 2:-

`\sf \cfrac{2x}{2}=\cfrac{-18}{2}`

`\sf x=-9`

Answer 2

`\sf \longmapsto \: 2x + 21 = 3`

`\sf \longmapsto2x = 3 - 21`

`\sf \longmapsto2x = - 18`

`\sf \longmapsto \: x = ( - 18)/(2)`

`\sf \longmapsto x = - 9`