stacy62202 stacy62202

12-05-2016
Mathematics

contestada

3x + 7y =47
-4x +7y =19

Respuesta :

JonathanHagen JonathanHagen

24-11-2016

3x+7y=47
-1(-4x+7y=19)

Distribute the -1 and add the equations together...you'll get:

7x=28
x=4

Plug X=4 back in...
12+7y=47
7y=35
y=5

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