What is the solution to this system of equations? x+3y−z=64x−2y+2z=−106x+z=−12

43x + 5y - 4z = 12

Step-by-step explanation:

x+3y−z=64x−2y+2z=−106x+z=−12

The solution is given if you group all x y and z together. The 'problem' is you have three equal signs...

If you want, you can split it into three steps.

1. Group the two first equations.

x+3y−z=64x−2y+2z

x+3y−z=64x−2y+2z

x - 64x + 3y + 2y −z -2z

-63x + 5y - 3z

2. Group the last two equations.

−106x+z=−12

−106x+z +12 = 0

3. Now use answer 1. and set it equal to answer 2, and group these equations.

-63x + 5y - 3z = −106x +z + 12

-63x + 106x + 5y - 3z -z = 12

43x + 5y - 4z = 12

And this is the answer we are looking for.

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.