Question

genteeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Answer 1

42 =(7/20) * x

x= 42*20/7

x = 120 é o total de alunos

online 120-42 = 78 alunos online

Answer 2

$\frac{7}{20}total=presencial$

$\frac{7}{20}total=42$

$total=42/\frac{7}{20}$

$total=42.\frac{20}{7}$

$total=\frac{840}{7}$

$total=120\ alunos$

$online=total-presencial$

$online=120-42$

$online=78\ alunos$

O total e a quantidade que participa das aulas online são, respectivamente, 120 e 78 alunos.