SOLUTION: How do I solve? and Which method would I use for this one substitution or elimination? I automatically think elimination because of the = sign. Showing work would be helpful, I am
Algebra.Com
Question 744680: How do I solve? and Which method would I use for this one substitution or elimination? I automatically think elimination because of the = sign. Showing work would be helpful, I am printing and using as a study guide. This is very frustrating :/ Thank you so much!
5x + 3y = 4
x - 4y = 3
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
5x + 3y = 4 ....(1)
x - 4y = 3 ....(2)
You now multiply line (1) by 4 and line (2) by 3
This is done to remove one of the unknowns namely 'y'
20x + 12y = 16
3x - 12y = 9
Add
23x = 25
x = 25/23
Substitute x = 25/23 into x - 4y = 3 ...(2)
25/23 - 4y = 3
- 4y = 3 - 25/23
Change 3 to 23rds
- 4y = 69/23 -25/23
-4y = 44/23
-y = 44/92
y = - 44/92 = -22/46 = -11/23
x = 25/23 : y = -11/23
RELATED QUESTIONS
Which method would I use to solve this equation - graphing, method of substitution or... (answered by richwmiller)
How would I use the elimination method for this equation?
a-3b=2... (answered by Fombitz)
how do i solve this equation using either substitution or elimination
y=x+4
y=3x
(answered by timvanswearingen)
How would I use the elimination method to solve for this equation.
5r+3t=-1... (answered by josgarithmetic)
Think i did them right but 2 & 3 are I get no solution and want to make sure I am not... (answered by jim_thompson5910)
How would I use the elimination method for this problem?
5r+2t=5... (answered by ewatrrr)
I would like you opinion on which method would you prefer to use when solving systems of... (answered by elima)
Systems of equations can be solved by graphing or by using substitution or elimination.... (answered by stanbon)
What is the best method to solve the system of equations?
2x + 3y = 8
4x - 6y = 2
I... (answered by fractalier,MathTherapy)