Julie has been offered two jobs. The first pays $400 per week. The second job pays $175 per week plus 15% commission on her sales. How much will she have to have her second job to pay as much as the first?

400 = 175 + 0.15x

0.15x = 225

15x = 22500

x = 1500

She will have to sell 1500 worth of sales to have the second job pay as much as the first.

So we solve for 1 week and set them equal to each other

first job pay=second job pay

400=175+15%ofsales

x=number of sales

400=175+0.15x

solve for x

subtract 175 from both sides

225=0.15x

divide both sides by 0.15

1500=x

she has to earn $1500 in sales per week to have as much as the other job