Question

class="latex-formula">




Free

Answer 1

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

$\sf \longmapsto2x = 3 - 21$

$\sf \longmapsto2x = - 18$

$\sf \longmapsto \: x = \frac{ - 18}{2}$

$\sf \longmapsto x = - 9$

Answer 2

Answer:

$\sf 2x+21=3$

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

$\sf 2x=-18$

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

$\boxed{\sf x=-9}$