SOLUTION: Use substitution to solve the linear system.
x + 4y = 21
4x + 2y = 6
AND Different problem:
Find the solution to the system by graphing.
x + y = 6
4x - y = 7
Algebra.Com
Question 27823: Use substitution to solve the linear system.
x + 4y = 21
4x + 2y = 6
AND Different problem:
Find the solution to the system by graphing.
x + y = 6
4x - y = 7
Answer by bmauger(101) (Show Source): You can put this solution on YOUR website!
Subtract 4y from both sides:
Now use 21-4y to substitute for x in the second equation:
Distribute:
Rearrange:
Divide:
Problem 2:
Graphically it looks like: (2.5, 3.5) or x=2.5 & y=3.5
Checking Check.
Pretty close... close as you should expect to get finding the answer through graphing.
RELATED QUESTIONS
Find the solution to system of equations by substitution.
Problem:... (answered by checkley71)
What is the slope m and y-intercept point of the line y = 2x + 1?
slope m = 2... (answered by oberobic)
I can't figure out these problems i keep getting different answers everytime i solve... (answered by stanbon,acacia<3)
Estimate the solution of the linear system graphically. Then check the solution... (answered by Boreal)
Wow! If this actually works, Im very impressed by this free algebra/tutoring resource. I... (answered by venugopalramana)
I'm not sure how to do this problem, it asks to solve by system of equations.
x+7y=8... (answered by solver91311,gonzo)
Okay, I've got one more, this one is also from a worksheet.
Solve the following system... (answered by jim_thompson5910)
Given the linear system
X + 2y = 1O
3x + (6 + t)y = 30,
(a) Determine a particular... (answered by MathLover1,ikleyn)
Find the pattern for the following series of numbers:
8, 5, 4, 9, 1, 7, 6, 3, 2, 0.
(answered by ankor@dixie-net.com)