Solve the system of equations by graphing

label Algebra
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-3x-y=-2

4x-4y=8

Oct 3rd, 2015

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y = -1 and x = 1 

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Oct 3rd, 2015

-3x-y=-2

4x-4y=8

simplify : 

3x + y = 2 

x - y = 2 

so : 

x = 2 + y 

we put x on the first equation : 

3(2 +y) + y = 2 

6 + 3y + y = 2 

4y = -4 

so :  y = -1 

we have to put y on one equation : 

x - ( -1) = 2 

x + 1 = 2 

x = 1 

so : 

y = -1 and x = 1 

if you don't understand just ask  

i am glad to work with you just invite me each time 

GOod luck 

Oct 3rd, 2015

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