10 pts if you help me figure out this problem!?

Question:solve each solution by addition.

x+5y=10

-2x-10y=-20

Answers:
It's an open problem.
multiplying both sides of the first equation you get 2x+10y=20
and the second equation is -2x-10y=-20
when you add them you have 0=0
so the solution set for x, y is all real numbers.
Hope that helps! =-)

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