Respuesta :
Given :-
- [tex] \bf4 \: times \: a \: number \: x \: is \: added \: to \: 12 \\ \bf the \: result \: is \: 8[/tex]
- [tex] \bf⟹ \: 4x + 12 = 8[/tex]
[tex]\large\bf{\underline{We\:have\:to\:find:-}}[/tex]
- [tex]\bf\:The \: number \: results \: when \: 2 \: times \: x \\ \bf is \: added \: to \: 7[/tex]
- [tex] \bf ⟹\: 2x + 7 = ?[/tex]
[tex]\large\bf{\underline{To \:find\:the\:value\:of\:x}}[/tex]
[tex]⟹4x + 12 = 8[/tex]
[tex]⟹4x = 8 - 12[/tex]
[tex]⟹4x = - 4[/tex]
[tex]⟹x = \frac{ - 4}{4} [/tex]
[tex]⟹x = - 1[/tex]
[tex]\large\bf{\underline{Putting\:the\:value\:of\:x\:in\:2x+7}}[/tex]
[tex]=2x + 7[/tex]
[tex]=2( - 1) + 7[/tex]
[tex]= - 2 + 7[/tex]
[tex]= 5[/tex]
__________________________________________
[tex]\large\bf{\underline{Hence}}[/tex]
[tex]\huge{2x + 7}[/tex]
[tex]\huge{=5}[/tex]
