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anonymous
 5 years ago
solve system equations by substitution
x+y=4
2x2y=8
anonymous
 5 years ago
solve system equations by substitution x+y=4 2x2y=8

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0in x+y = 4, minus the x from both sides, so y = 4x, plug in 4x into your bottom equation and solve, ... 2x 2(4x) = 8

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0once you have your x value, plug that into first equation to get your y

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no i still think its (1,3)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the answer is the identity

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0it's when there is an infinite number of solutions, not just one when you solve the equations by substitution you end up with 8=8 which is always true

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so is it (0,4) for my answer

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no the answer is any set of numbers that will work in the first equation, there are an infinite number of answers such as (0, 4), (2,2), (1/2, 3 1/2), (6, 10) all of these sets will work in the first equation and the second
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