2x + y = x - y - 3 = 6
Add 3 to everything
2x + y + 3 = x - y - 3 + 3 = 6 + 3
2x + y + 3 = x - y = 9
2x + y + 3 = 9
2x + y = 6 = x - y
Add y to everything
2x + 2y = 6 + y = x
Since x = 6 + y substitute every x with 6 + y
2(6 + y) + 2y = x
12 + 4y = x
This is as simplified as I can get and then just place 12 + 4y into every x in the original problem then solve
Lets say the 3x3 Matrix is
M = [1 5 2 ]
[1 1 7 ]
[0 -3 7 ]
We apply the Gauss-Jordan elimination method
(Procedure and result shown in the image below)
Answer:
Please give me the rest of the question
Step-by-step explanation:
I will answer you in the comments.
:D
by Quadratic formula , , values of x are . None of mentioned options are correct according to question!
<u>Step-by-step explanation:</u>
Here we have , expression x2 + 20 = 2x or , .
We know that Quadratic formula is :
⇒
Putting this value in equation :
⇒
⇒
⇒
⇒
⇒
Therefore , by Quadratic formula , , values of x are . None of mentioned options are correct according to question!
25.3 × 1.08
27.324
The total bill is $27.32