A health club charges a $50 initial fee, plus $2 for each visit. Marsha has spent a total of $144 at the health club this year. Write and solve a equation to find how many visits she has made.

Use these variables to make an equation-

y is the total amount.

$50 is where you start charging (y intercept, variable b).

x is how many visits Marsha made.

The equation can be in slope-intercept form (y=mx+b) -

$144=$2x+50

Solve for x using inverse operations.

Subtract 50 from both sides-

144-50=2x+50-50

94=2x

Divide 2 from both sides-

94/2=2/2

x=47

Marsha made 47 visits to the health club.