SOLUTION: x-3y=0 3x+y=7

Algebra ->  Expressions-with-variables -> SOLUTION: x-3y=0 3x+y=7      Log On


   



Question 276756: x-3y=0 3x+y=7
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x-3y=0
x=3y
Replace x in the next equation with (3y)
3x+y=7
3(3y)+y=7
9y+y=7
10y=7
y=7/10
y=.7 ans.
x=3*.7
x=2.1 ans.
Proof:
3*2.1+.7=7
6.3+.7=7
7=7