TigerKittyPlayz
contestada

The first row of an auditorium has 42 seats Each row after The first has three more seats thanbtbe row before it.

Find the amount of seats in row 45

Which row has 90 seats



Help me pls, I need to find an equation but idk how

Respuesta :

42+3(x-1) where x is the row number

42+3(x-1)=90 ~ subtract 42 from both sides
3(x-1) = 48 ~ divide by 3
x-1=16 ~ add 1
x=17 ~ the 17th row has 90 chairs