<PRE><B>Question 822502</B>
---
x + y = 1120/80 km/min
x - y = 1120/84 km/min
---
put the system of linear equations into standard form
---
x + y = 1120/80 km/min * (60 min/hour) = 840 km/hr
x - y = 1120/84 km/min * (60 min/hour) = 800 km/hr
---
x + y = 840
x - y = 800
---
copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
answer:
x= airplane speed = 820 km/hr
y= wind speed = 20 km/hr
---
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</PRE>