use the row operations tool to solve the following system of equations, obtaining the solutions in fraction form.
12x + 2y + z = 4
3x + 3y - 4z = 5
2x - 2y + 4z = 1
give the values for x, y, and z with the fractions reduced to lowest terms (for example 4/7 rather than 8/14).
x =
y =
z =

Step-by-step explanation:

We start by putting our equation in a matricial form:

Then, we multiply the second row by 4 and substract the first row:

Now, multiply the third row by 6 and substract the first row:

Next, we will add times the second row to the third row:

Now we can solve to obtain

Then wich implies that

Finally

.

whatever you can spend with $11.53 or under.

step-by-step explanation:

20 - 8.47 = 11.53. take away the money he used for lunch from the starting amount of 20.