Solve the system of equations using the substitution method. x=3+12y −2x−y=3

substitute x=3+12y into -2x-y=3

-2(3+12y) -y=3

distribute

-6-24y-y=3

combine  like terms

-6 -25y =3

add 6 to each side

-25y =9

divide by -25

y =-9/25

now substitute into x=3+12y

x=3+12y

x=3+12(-9/25)

x=3-108/25

x= 75/25 -108/25

x=-33/25

x=-33/25,  y=9/25

the slope of the line is 60

one point on the line is (40,10)

step-by-step explanation:

in the equation outside the parenthesis the equation always tells you the slope. in this case it is 60.

in the parenthesis is also says 40 which is x because it is near the x and 10 is y because it is near y.

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total