Icantfindausername Icantfindausername

03-11-2016
Mathematics

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Systems of equations using linear combinations/elimination

2x+5y=3
-x+3y=-7

a.4,1
b4,-1
c2,1
d2,0

Respuesta :

Cindycawell01 Cindycawell01

03-11-2016

The answer is B
2x+5y=3(1) times it by 1
-x+3y=-7(2) times it by 2
____________________
2x+5y=3
-2x+6y=-14
__________
11y=-11
Y=-1

Now we have to found x..... you have to plug in -1 in 2x+5y=3...

2x+5(-1)=3
2x-5=3
2x=3+5
2x=8
X=8/2
X=4

There are your 2 solutions... hope you understand

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