Question 923862: David's mass is 5kg less than john's, who in turn is 8kg lighter than than paul. If their total mass is 197kg, how heavy is each person? Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! x = david mass
y = john mass
z = paul mass
---
x = y - 5
y = z - 8
x + y + z = 197
---
put the system of linear equations into standard form
---
x - y = -5
y - z = -8
x + y + z = 197
---
copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
solution:
x = david mass = 59.666667
y = john mass = 64.666667
z = paul mass = 72.666667
---
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
