Respuesta :
firslty,
[tex]4+3 = 7[/tex] packs of pencils were bought in total
each one contains 12 pencils, so
[tex]7*12 = 84[/tex] pencils were bought
[tex]4+3 = 7[/tex] packs of pencils were bought in total
each one contains 12 pencils, so
[tex]7*12 = 84[/tex] pencils were bought