brotherwiggles brotherwiggles

11-03-2020
Mathematics

contestada

Solve the system of equations and choose the correct answer from the list of options. x − y = 7 y = 3x + 12

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Yang100 Yang100

11-03-2020

Answer:

x=-19/2, -33/2. (-19/2, -33/2).

Step-by-step explanation:

x-y=7

y=3x+12

-------------

y=x-7

x-7=3x+12

x-3x-7=12

-2x-7=12

-2x=12+7

-2x=19

x=19/-2

-19/2-y=7

y=-19/2-7

y=-19/2-14/2

y=-33/2

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