find the solution of the system of equations
2x-4y=32
2x-8y=48
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jimthompson5910 (jim_thompson5910):
subtract equation 2 from equation 1 to get
2x-4y=32
2x-8y=48
----------
0x + 4y = -16
so
4y = -16
y = ???
jimthompson5910 (jim_thompson5910):
once you determine the value of y, you can use it to find the value of x
OpenStudy (anonymous):
come on melissa....you can do this....jim pretty much gave you most of the problem
OpenStudy (anonymous):
you just have to divide everything by 4 and you get your answer
OpenStudy (anonymous):
-4
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OpenStudy (anonymous):
yes(:
jimthompson5910 (jim_thompson5910):
now that you know that y = -4, you can use this to find x
so pick on any equation, plug it in and solve for x
I'll use the first equation
2x-4y=32
2x-4(-4)=32
2x + 16 = 32
...
...
...
x = ???
OpenStudy (anonymous):
8
jimthompson5910 (jim_thompson5910):
correct
OpenStudy (anonymous):
8,-4
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