Friday
November 21, 2014

Homework Help: Math

Posted by Katie Lee on Thursday, September 15, 2011 at 11:42pm.

5x+3y=-11, 7x-2y=19 solve by elimination.
Sol'n:
5x+3y = -11 ---(1)x 2, 10x + 6y = -22 ----(1')
7x-2y = 19 ---(2)x 3, 21x - 6y = 57 ----(2')
add 1' and 2'
31x = 55, divide by 31 on both side to obtain the value of x,
x = 35/31
then find y: from (2)
7(35/31) - 19 = 2y
2y = -344/31, then divide by 2 on both side to obtain the value of y.
y = -172/31
thus
x = 35/31 and y = -172/31 <----- answer
How do you get -344/31 in this problem?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Algebra - How do I solve for the elimination method: 5x + 3y= -7 and 7x - 2y =13...
math - Solve using elimination method -7x+5y=-56;-21x-2y=-168
Algebra - 3x^8 7x^8 A.-4x^16 B.21x^8 C.4x^8 D.10x^8 I think this is C......
algebra 1 - Use elimination to solve the the system of equations given by 10x-...
Math - Can someone please check my answers below for accurateness? The ...
math(algebra) - solve by elimination method. 5x+6y=3 10x+12y=6
math 3 - Solve the following system using the elimination method: 10x - 6y = -...
Math(Please check my work.) - (2x-3)(x^2+5x-3)=2x+10x^2-15x+9 *Is this correct...
math - Use an elimination strategy to solve this linear system: 10x + 10y = 1030...
Algerbra - how do you solve 7(3x+4)=8(2x+5)+13 expand the parenthesis...I will ...

Search
Members