75 бутеров!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer: 30
Step-by-step explanation:
21+39/2
=30
Answer:
Therefore the solution set is (x , y) = ( 2 , 1 )
Step-by-step explanation:
Given:
...............Equation ( 1 )
...............Equation ( 2 )
...............Equation ( 3 )
To Find:
x = ?
y = ?
Solution:
Using Substitution Method we will have
Substitute above ' y ' Equation 3 in Equation 1 we get
![-2x+(3-x)=-3\\-2x-x=-3-3\\-3x=-6\\3x=6\\x=\dfrac{6}{3}=2\\\\x=2](https://tex.z-dn.net/?f=-2x%2B%283-x%29%3D-3%5C%5C-2x-x%3D-3-3%5C%5C-3x%3D-6%5C%5C3x%3D6%5C%5Cx%3D%5Cdfrac%7B6%7D%7B3%7D%3D2%5C%5C%5C%5Cx%3D2)
Now Substitute ' x ' in Equation 3 we get
![y=3-2=1\\y=1](https://tex.z-dn.net/?f=y%3D3-2%3D1%5C%5Cy%3D1)
Therefore the solution set is (x , y) = ( 2 , 1 )