math
posted by pam .
solve the system of equations by elimination.
3x4y=22
2x+5y=7

3x  4y = 22
2x + 5y = 7
To eliminate variable x,
Multiply by 2 (3x  4y = 22)
Multiply by 3 (2x + 5y = 7)
Add equations
6x + 8y = 44
6x + 15y = 21
0 + 23y = 23
23y = 23
y = 1
To find x,
substitute y = 1, in 2x + 5y = 7
2x + 5y = 7
2x  5 = 7
2x = 12
x = 6
x = 6, y = 1 
x=6

3x+4y=22
Respond to this Question
Similar Questions

Math
Use elimination to solve each system of equations. x+y2z=10 8x9yz=5 3x+4y+2z=10 I need to figure out what x,y, and z each equal. I must use the elimination method. 
College Algebra
Please help! x2y+z=7 2x+yz=0 3x+2y2z=2 a. Solve the above system of equations using Gaussian Elimination or GaussJordan Elimination. You must show row operations. b. Solve the above system of equations using Cramer's Rule. 
Math
Please help! x2y+z=7 2x+yz=0 3x+2y2z=2 a. Solve the above system of equations using Gaussian Elimination or GaussJordan Elimination. You must show row operations. b. Solve the above system of equations using Cramer's Rule. 
math
Use elimination to solve each system of equations. x+y=3 2x3y=16 
algebra
i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y  1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations … 
Math
Use the elimination method to solve the system of equations 5u+2v=15 3u+v=7 
Math
Use elimination to solve the system of equations. x + 2y = 18 x + 8y = 38 
Math
I need to use the Gaussian Elimination to solve a system of equations, but I have no idea on how to do that. I remember doing these in high school, but since its been a while I can't remember exactly how to do it. Here's the system … 
math
Solve the system of equations by elimination. (2 marks) y=2x^22x3 y=x^22x3 
math
Solve the system of equations by elimination. (2 marks) y=2x^22x3 y=x^22x3