x=5 5=x should be reflexive property
Answer:
x = 3
y = 0
z = 8
Step-by-step explanation:
a) 3x + 3y - z = 1
b) z = 8
c) -x -3y + 2z = 13
a) 3x + 3y - 8 = 1 (substitution)
a) 3x + 3y = 9
c) - x - 3y + 2(8) = 13 (substitution)
c) -x - 3y + 16 = 13
c) -x - 3y = -3
(3x + 3y = 9) + (-x -3y = -3)
= 2x = 6
x = 3
a) 3(3) + 3y - 8 = 1
9 + 3y - 8 = 1
y = (1 -9 + 8)/3
y = 0
Answer:
see below
Step-by-step explanation:
Hi!
![\frac{1}{21-20} \left[\begin{array}{ccc}-3&10&\\2&-7&\end{array}\right]](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B21-20%7D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-3%2610%26%5C%5C2%26-7%26%5Cend%7Barray%7D%5Cright%5D)
(Determinant is 1 in this case)
Hence the inverse is:
![\left[\begin{array}{ccc}-3&10\\2&-7&\\\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-3%2610%5C%5C2%26-7%26%5C%5C%5Cend%7Barray%7D%5Cright%5D)
The required equation of the line is ![3x-4y=6](https://tex.z-dn.net/?f=3x-4y%3D6)
What is an equation?
An equation is a formula in mathematics that expresses the equivalence of two expressions by linking them with the equals symbol =. The word equation and its cognates in various languages may have somewhat different definitions; for example, in French, an équation is defined as including one or more variables, but in English, an equation is any well-formed formula consisting of two expressions linked by an equals sign.
Slope of the line, m is
![=\frac{3}{4}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B3%7D%7B4%7D)
then, the equation of the line is given by
![y-y_{1}=m(x-x_{1} )](https://tex.z-dn.net/?f=y-y_%7B1%7D%3Dm%28x-x_%7B1%7D%20%29)
![or, y-3=\frac{3}{4} (x-6)](https://tex.z-dn.net/?f=or%2C%20y-3%3D%5Cfrac%7B3%7D%7B4%7D%20%28x-6%29)
![or, 4y-12=3x-18](https://tex.z-dn.net/?f=or%2C%204y-12%3D3x-18)
![or, 3x-4y=6](https://tex.z-dn.net/?f=or%2C%203x-4y%3D6)
Hence, the required equation of the line is ![3x-4y=6](https://tex.z-dn.net/?f=3x-4y%3D6)
To know more about equations, click on the link
brainly.com/question/28196676
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