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12-01-2017
Mathematics

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PLEASE DON'T GUESS!!!
What is the solution of the system? Use substitution. y = x + 6 y = 2x

A. (–6, –12)
B. (–12, –6)
C. (2, 4)
D. (6, 12)

Respuesta :

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12-01-2017

y = x + 6
y = 2x
replace y =2x into y = x + 6

y = x + 6
2x = x + 6
x = 6

y =2x = 2(6) = 12

x = 6 and y =12
answer: D. (6, 12)

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