Lindsey practices the guitar 50 minutes on Saturday and 30 minutes on most weekdays. Last week she practiced 140 minutes. How many weekdays did she practice? Write an equation in the form px+q=r to represent this problem.

Answer 1

Let x be the number of weekdays Lindsey practiced.
On weekdays she practiced guitar for 30x minutes.
Lindsey practiced for 30x + 50 minutes in total.
We know that 30x + 50 + 140 = 190 minutes.
So the equation is 30x + 50 + 140 = 190. Answer: \boxed{5}.