The solution is x=1 and y=-2
Further explanation:
Given equations are:
![\frac{7}{2}x-\frac{1}{2}y=\frac{9}{2}\\3x-y=5](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B2%7Dx-%5Cfrac%7B1%7D%7B2%7Dy%3D%5Cfrac%7B9%7D%7B2%7D%5C%5C3x-y%3D5)
Multiplying equation no. 1 with 2 will give us:
Eqn 3
From equation no 2:
![3x-y=5\\-y=5-3x\\y=3x-5](https://tex.z-dn.net/?f=3x-y%3D5%5C%5C-y%3D5-3x%5C%5Cy%3D3x-5)
Putting the value of y in eqn 3
![7x-(3x-5)=9\\7x-3x+5=9\\4x=9-5\\4x=4\\\frac{4x}{4}=\frac{4}{4}\\x=1\\Putting\ x=1\ in\ equation\ 2\\3(1)-y=5\\3-y=5\\-y=5-3\\-y=2\\y=-2\\](https://tex.z-dn.net/?f=7x-%283x-5%29%3D9%5C%5C7x-3x%2B5%3D9%5C%5C4x%3D9-5%5C%5C4x%3D4%5C%5C%5Cfrac%7B4x%7D%7B4%7D%3D%5Cfrac%7B4%7D%7B4%7D%5C%5Cx%3D1%5C%5CPutting%5C%20x%3D1%5C%20in%5C%20equation%5C%202%5C%5C3%281%29-y%3D5%5C%5C3-y%3D5%5C%5C-y%3D5-3%5C%5C-y%3D2%5C%5Cy%3D-2%5C%5C)
The solution is x=1 and y=-2
Keywords: Linear equations, Solution set
Learn more about linear equations at:
#LearnwithBrainly
You must use the Order of Operations
Parentheses
Exponents
Multiply
Divide
Add
Subtract
Answer:
1.05
Step-by-step explanation:
3.5x.30=1.05
100 * pi = pi * r^2
Pi cancels on both sides of the equation
So... 100= r^2
= radius is 10