Solve by substitution
2x+3y=40.50
3x+y=38.00
2 answers
Use the process of elimation and elimate the x varible. This gives you the y variable. Then you substitue this answer for the x varible. If you need any help with the process of elimantion, I could asist you more.
However, using substitution,
pick either equation and solve for a variable:
3x+y = 38.0
so,
y = 38-3x
Now substitute that value into the other equation:
2x+3y=40.50
2x + 3(38-3x) = 40.5
2x + 114 - 9x = 40.5
-7x = -73.5
x = 10.5
y = 38-3x = 6.5
pick either equation and solve for a variable:
3x+y = 38.0
so,
y = 38-3x
Now substitute that value into the other equation:
2x+3y=40.50
2x + 3(38-3x) = 40.5
2x + 114 - 9x = 40.5
-7x = -73.5
x = 10.5
y = 38-3x = 6.5
1 answer