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

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

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

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