Answer:
![x = 8](https://tex.z-dn.net/?f=x%20%3D%208)
![y = -3](https://tex.z-dn.net/?f=y%20%3D%20-3)
Step-by-step explanation:
Given :
...................... equation 1
........................ equation 2
solving the system of linear equation by substitution method , substitute equation 1 into equation 2 , that is
![x + 2(-x+5) = 2](https://tex.z-dn.net/?f=x%20%2B%202%28-x%2B5%29%20%3D%202)
![x - 2x + 10 = 2](https://tex.z-dn.net/?f=x%20-%202x%20%2B%2010%20%3D%202)
![-x + 10 = 2](https://tex.z-dn.net/?f=-x%20%2B%2010%20%3D%202)
collect the like terms
![10 - 2 = x](https://tex.z-dn.net/?f=10%20-%202%20%3D%20x)
therefore :
![x = 8](https://tex.z-dn.net/?f=x%20%3D%208)
substitute
into equation 1 to find the value of y , that is
![y = -8 + 5](https://tex.z-dn.net/?f=y%20%3D%20-8%20%2B%205)
![y = -3](https://tex.z-dn.net/?f=y%20%3D%20-3)
Therefore :
![x = 8](https://tex.z-dn.net/?f=x%20%3D%208)
![y = -3](https://tex.z-dn.net/?f=y%20%3D%20-3)
What about it? 7x+5 equals what
15 + 17r - 4r - 9 = 9
6 + 13r = 9
13r = -3
r = -3/13
:)