Imnotamaster

Yes, As I read it, x/2 is for me x divided by 2. As x/2 = 8, x divided by 2 is 8, and 16 divided by 2 is 8, so X=16

Agreed, but does it really matter, I mean, its still working, If it bothers you that much, send a message to the admin console.

Since we know that 1/4 of an inch is 3 miles,

then if we times 4 from both sides, then we get 1 inch = 12 miles

Since the cities distance is 15 inches, we times 1 by 15 and 12 by 15

1 x 15 = 15, and 12 x 15 = 180

so its 180 miles

the first one has no solutions, I will show you how, by step

1) we rewrite the equations : x+y=−1;3x=−3y+4

2) in the x+y=-1, we solve for x

x+y=−1

x+y+−y=−1+−y(Add -y to both sides)

x=−y−1

3)Substitute−y−1for x in 3x=−3y+4:

3x=−3y+4

3(−y−1)=−3y+4

−3y−3=−3y+4(Simplify both sides of the equation)

−3y−3+3y=−3y+4+3y(Add 3y to both sides)

−3=4

−3+3=4+3(Add 3 to both sides)

0=7

and so there are no solution

the second one:

1)Solve3x−4y+2=0 for x:

3x−4y+2=0

3x−4y+2+4y=0+4y(Add 4y to both sides)

3x+2=4y

3x+2+−2=4y+−2(Add -2 to both sides)

3x=4y−2

3x/3 = (4y-2)/3

(Divide both sides by 3)

x=4/3y + -2/3

Problem 2: Substitute 4/3y + -2/3 for x in -10y+10=15x-10

−10y+10=15x−10

−10y+10=15(4/3y+-2/3)-10

−10y+10=20y−20(Simplify both sides of the equation)

−10y+10+−20y=20y−20+−20y(Add -20y to both sides)

−30y+10=−20

−30y+10+−10=−20+−10(Add -10 to both sides)

−30y=−30

-30y/-30 = -30/-30, (Divide both sides by -30)

and Y=1

Now we solve for X

x=4/3y+-2/3

x=4/3(1) +-2/3

x=2/3

so x=2/3 and y=1

Since he can deliver to 130 houses, in a 2.5 hour period you should

figure out how many he can deliver in 1/2 an hour, which is 26

divide 234 by 26, 

and you get 9

9  x 1/2 is equal to 9/2

which is equal to 4.5 hours

Since, the player cost 400, and the video-game enthusiast has $750, then he only has $350 left to spend for the games. 

Round 49 to 50

50 goes into 350 7 times

minus 7 because of the rounding,

7 games can be bought