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For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation? 3x + y = 8
-x - 2y = -10

Respuesta :

-2y would replace y and -x would replace 8
bcalle
x = 2y + 10 would be what you put into the first equation.
The first equation would then become  3(2y + 10) + y = 8

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