XxMysteriousGirlxX

The smallest 4-digit n =1256

1256 mod 9 =5

1256 mod 7 =3

1256 mod 5 =1

Get y by itself in the first equation

x + y + 3z = 10      →   y =  10 - x - 3z

Substitute this into the second equation and simplify:

-4x + 2y +5z = 7    →   -4x + 2(10 - x - 3z) + 5z = 7   →   -4x + 20 -2x - 6z + 5z  = 7  →  -6x - z = -13  →

6x + z  = 13

So we have this system:

k*x + z = 3

6x + z = 13 

And notice that, if k =6, we would have this system:

6x + z  = 3      and

6x + z  = 13       but this is impossible, because two things added together can't possibly have two different outcomes 

So....as geno found, when k = 6, the system has no solution...!!!

WORD OF CPhill

"Angle BAC = angle ZAC  =  43°

Angle CZA = angle CZB = 90°

So triangle ZAC  is a right triangle and angle  ZCA  is complementary to angle ZAC  = 47°

And angle ZCA   =   angle HCA  =   47°"

WORDS OF CPhill

Well your logged in now. Would you like to chat?

Why do you say that?

Become a member!!

No it means that they don't know what to say.

hello

Lol okay.

When ever I did it I got the same answers as you did and I cant really see if they are correct this is for school so we will see if they are correct tomorrow when I turn it in.

Sorry...