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Rodney is given two linear equations: x – y = 11 and 2x + y = 19. What value of x should he get as a solution for this system of linear equations?

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mathmate
Add the two equations and solve for x.

x-y=11 ...................(1)
2x+y=19.................(2)

(1)+(2)
x+2x-y+y = 11+19
3x=30
x=10  (answer)
the answer would be 10, just got this right

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