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2 years ago

12

3x - y = 7

1 answer:

nataly862011 [7]2 years ago

6 0

3x - y = 7
6x - y = 10

if you subtract the second equation from the first to eliminate y you get:
3x-y-(6x-y)=7-10
3x-y-6x+y=-3
-3x=-3

so option C) -3x=-3 is the solution

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