Search 74,210 tutors
FIND TUTORS
Ask a question
0 0

sam makes $400 per week plus $20 commission on each new cell phone plan she cell.she earend$680 last week.how manyplans did she sell last week

Tutors, please sign in to answer this question.

2 Answers

A simple answer using no algebra is this:  If she earned a salary of $400 with a total payout of $680, obviously she made $280 over and above her basic salary ($680 - $400 = $280).  Then you do simple short division to get the quantity of 14 phones ($280 divided by $20 for each phone = 14 cell phone plans sold)!
To write the equation, you can start with the answer of $680.  She receives $400 + $20*plans sold:

400 + 20p = 680

20p = 280

p = 14

{$400 + $20 * 14 = 680}

Sam sold 14 plans to make a total of $680.