SOLUTION: please help me solve theese two equations please : a. x+y=4 2y-x=-1 b.x+y=4 x-y=-2

Algebra ->  Linear-equations -> SOLUTION: please help me solve theese two equations please : a. x+y=4 2y-x=-1 b.x+y=4 x-y=-2       Log On


   

Question 384058: please help me solve theese two equations please :
a. x+y=4
2y-x=-1

b.x+y=4
x-y=-2
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
2y-(-y+4)=-1
2y+y-4=-1
3y=3
y=1
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x+1=4
x=3
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1+3=4
2*1-3=-1