Resposta:
[tex]\boxed{\red{ \sf{x = \frac{25}{3} }}}[/tex]
Explicação passo-a-passo:
[tex]\blue {{ _{\heartsuit} } \heartsuit_{\heartsuit} } \: \: \mathsf {OI, TUDO \: \: J\acute{O}IA \: ? \: \:\blue {{ _{\heartsuit} } \heartsuit_{\heartsuit} } }[/tex]
[tex] \sf{3(x - 1) - 7 = 15} \\ \\ \sf{3x - 3 - 7 = 15} \\ \\ \sf{3x - 10 = 15} \\ \\ \sf{3x = 15 + 10} \\ \\ \sf{3x = 25} \\ \\ \boxed{\red{ \sf{x = \frac{25}{3} }}}[/tex]
[tex]\mathcal{ATT : ARMANDO}[/tex]
[tex]\mathfrak{\small03\diagup01\diagup2021} \\ \mathfrak{\small{8} :{55} \: \: pm}[/tex]
