SOLUTION: elimination/ addition 3x + y = 7 x + 2y = 4 with steps too

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Question 449402: elimination/ addition
3x + y = 7
x + 2y = 4
with steps too
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
3x+y=7 .............1
x+2y=4 .............2
Eliminate y
multiply (1)by -2
Multiply (2) by 1
-6x-2y=-14
x+2y=4
Add the two equations
-5x=-10
/-5
x=2
plug value of x in (1)
3x+y=7
6+y=7
y=7-6
y=1