lakeshore61
Answered

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Question 4

(08.03)


Solve the system of equations and choose the correct answer from the list of options.


x − y = 7

y = 3x + 12


Question 4 options:


1)


2 over 19 comma 2 over 33


2)


negative 2 over 19 comma negative 33 over 2


3)


negative 19 over 2 comma negative 33 over 2


4)


19 over 2 comma 33 over 2

Sagot :

clarch19

Answer:

x = -9 1/2

y = -16 1/2

Step-by-step explanation:

x - y = 7

solve the above for 'y':  -y = 7 - x

multiple each side by -1:  y = x - 7

now both equations are in 'y=' form

x - 7 = 3x + 12

-2x - 7 = 12

-2x = 19

x = -19/2 or -9 1/2

-9.5 - y = 7

-y = 16.5

y = -16.5 or -16 1/2

                                       

Answer:

(-19/2, -33/2)

Step-by-step explanation:

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