|
Question 822539: In a show adult ticket is sold at 1 $ each ticket, and child ticket costs 75 cents, total 140 tickets have been sold, and 150 $ earned, tell how many each tickets sold? Solution . . . Plz any one
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! ---
x + y = 140
x + 0.75y = 150
---
copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
x= number adult = 180
y= number child = -40
---
check the above answer by the elimination method:
---
x + y = 140
x + 0.75y = 150
---
x + y = 140
-x - 0.75y = -150
---
add:
0.25y = -10
y = number child = -40
x = number adult = 180
---
the elimination method yields the same answer as the matrix method (used by the solver):
---
answer:
NOTE: the number of child tickets sold is negative, which is impossible.
this means that the problem statement contains an error.
please correct the problem statement and resubmit your question.
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
|
|
|
| |
