Solve the following system of equations.
2a - 3b + c = 10
2a - 2b - 2c = 2
a + 3b + 2c = -1

Question

Solve the following system of equations. 
2a - 3b + c = 10
2a - 2b - 2c = 2
a + 3b + 2c = -1

anonymous · Answer

Verify that 
a=1,   b=-2,   c=2

anonymous · Answer

i dont understand your question @robtobey

triciaal · Answer

one method 
using equation 1 write c = 
using equation 3 write a = 
substituting for a and c in equation 2 solve for b

anonymous · Answer

thats a bit confusing to me.. could you give me an example or help me work through this problem??

triciaal · Answer

what is the first equation?

anonymous · Answer

Add the 2nd and 3rd equations together and the 2c will subtract out.
Add twice the 1st equation to the 2nd equation and the 2c will subtract out.
You now have two equations in a and b.