Answer:
[tex] \huge{ \fbox{ \sf{x = 10}}}[/tex]
Step-by-step explanation:
[tex] \bigstar{ \sf{ \: \: 4x - 19 = 21}}[/tex]
[tex] \underline{ \underline{ \mathfrak{Let's \: solve}}} : [/tex]
[tex] \text{Step \: 1} : \sf{Move \: 19 \: to \: right \: hand \: side \: and \: change \: it's \: sign}[/tex]
[tex] \mapsto{ \sf{4x = 21 + 19}}[/tex]
[tex] \text{ Step \: 2} : \sf{Add \: the \: numbers : 21 \: and \: 19}[/tex]
[tex] \mapsto{ \sf{4x = 40}}[/tex]
[tex] \text{Step \: 3} : \sf{Divide \: both \: sides \: by \: 4}[/tex]
[tex] \mapsto{ \sf{ \frac{4x}{4} = \frac{40}{4} }}[/tex]
[tex] \text{Step \: 4} : \sf{Calculate}[/tex]
[tex] \mapsto{ \sf{x = 10}}[/tex]
Hope I helped!
Best regards! :D
~TheAnimeGirl
