SOLUTION: what is 2x+y=21 and x-y=6

Algebra ->  Equations -> SOLUTION: what is 2x+y=21 and x-y=6       Log On


   

Question 1013865: what is 2x+y=21 and x-y=6

Found 2 solutions by ikleyn, fractalier:
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
.
what is 2x+y=21 and x-y=6
------------------------------

It is the system of two equations in two unknowns.


Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
From these two equations, we add them to get
2x+y=21
x-y=6
-----------
3x = 27
x = 9
y = 3