SOLUTION: Solve the following system of equations for x: 4x + y = 11 x + y = 2

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Question 252571: Solve the following system of equations for x:
4x + y = 11
x + y = 2
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
Here are our two equations:
(i) 4x+%2B+y+=+11
(ii) 1x+%2B+1y+=+2
step 1 - multiply (i) by -1.
(iii) -4x+-+1y+=+-11
(iv) +1x+%2B+1y+=+2
step 2 - add down to eliminate y.
(v) -3X = -9 - - > X = 3.
Step 3 - find y.
x=3 means y = -1.