Please help me (confusing)

label Mathematics
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Use the linear combination method to solve this system of equations.

{4x+2y=53x+y=9

What is the solution?

Jun 3rd, 2015

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Jun 3rd, 2015

{4x+2y=53x+y=9

Jun 3rd, 2015

{4x+2y=5}1

3x+y=9}2

4x+2y=5

-6x+2y=18

-2x= -13

x= 6.5


4x+2y=5

4(6.5)+2y= 5

26+2y=5

2y=5-26

y=-10.5


Jun 3rd, 2015

your pretty good :]  might you know this one solve the system of equations  4x−y=0y=12x+7

Jun 3rd, 2015

you will gladly get 5 *****

Jun 3rd, 2015

4x−y=0

y=12x+7

4x-y=0

 +       -12x+y=7

-8x= 7

x= -7/8

4x-y=0

4(-7/8)-y=0

y= -3.5


Jun 3rd, 2015

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Jun 3rd, 2015
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