Posted by mike on Friday, December 18, 2009 at 7:17pm.
I did a problem and used the substitution method and it took me forever to solve by hand. Is there a shorter way to show how this problem was done. The problem was
The final answer came out to be
- Algebra Question - Reiny, Friday, December 18, 2009 at 11:36pm
This problem just "begs" to be done by elimination, look at the y values
add #1 and #2 2x + 3z = 14 #4
add #2 and #3 3x + 5z = 22 #5
triple #4 -- 6x + 9z = 42
double #5 -- 6x + 10z = 44
subtract #5 - #4
z = 2
sub into #4 -- 2x+6 = 14 , x = 4
back into #1
4 + y + 2 = 7
y = 1
Answer This Question
More Related Questions
- algebra - Here is my question. How do you solve th substitution method in this ...
- Substitution Method-Plz help - Use the Substitution method to solve the system ...
- Algebra 1 - bobpursey, In this problem you helped me with earlier: Solve using ...
- Calculus - Given two problems: Problem A: Tau = Integral(0 to v) v/(q^2 - v^2) ...
- Grade 11th Maths - (Second Time posting this problem)This problem is related to ...
- Algebra - The problem is 9x+4y=-12 x=26-5y Solve by substitution method
- Honors Algebra II - I've been stuck on a problem with my homework for a couple ...
- Algebra - Use the above graph of f(x) to complete the following table for ...
- Math - How would you solve this problem?: x2 + y2 = 25 x2 - y = 5 You have to ...
- Geometry - Complete Problem #28 in Section 1.5 Exercises (Chapter 1) of ...