Lindsay 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

Let's define \( x \) as the number of weekdays Lindsay practiced the guitar.

We know that:

• On Saturday, she practices for 50 minutes.
• On each weekday, she practices for 30 minutes.
• The total practice time for the week is 140 minutes.

The equation representing this situation can be formed by adding her Saturday practice time to the total practice time on weekdays, which can be expressed as \( 30x \) (where \( x \) is the number of weekdays):

\[ 30x + 50 = 140 \]

This equation is in the form \( px + q = r \), where:

• \( p = 30 \)
• \( q = 50 \)
• \( r = 140 \)

So the final equation is:

\[ 30x + 50 = 140 \]