You buy the same number of brushes, rollers and paint cans. Write an expression in simples form that represents the total amount of money you spend for painting supplies. Paint $21.79
Brush $3.99 and Paint Roller $6.89
T= 21.79x + 3.99x + 6.89x where t is the total cost and x is the number of brushes/rollers/paint cans you buy. You don't need a different variable for each item because you buy the same amount of each.