SOLUTION: A book store sold 144 graphing calculators using two different models. Some of these were the Basic Grapher Model (which sells for $23 each) and the rest were the exquisite Super

Algebra ->  Linear-equations -> SOLUTION: A book store sold 144 graphing calculators using two different models. Some of these were the Basic Grapher Model (which sells for $23 each) and the rest were the exquisite Super      Log On


   



Question 1120005: A book store sold 144 graphing calculators using two different models. Some of these were the Basic Grapher Model (which sells for $23 each) and the rest were the exquisite SuperGrapher model (which sells for $90 each). The book store received a total of $10347 from that sale of these two calculators. Using algebra find how many of the BasicGrapher and how many of the SuperGrapher were sold.
Thank you

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
B- number of basic calculators
S- number of super calculators
1.B%2BS=144 - Total number of calculators
.
.
2.23%2AB%2B90%2AS=10347 - Total value of calculators
From 1,
B=144-S
Substitute into 2,
23%28144-S%29%2B90S=10347
3312-23S%2B90S=10347
67S=7035
Solve for S then use either equation to solve for B.