Posted by Eli on Saturday, December 11, 2010 at 2:28am.
Solve the system:
x + y + z = 1
2x + 2y + 5z = 1
5x + 2y + 3z = 8
what is the value of x in the solution?

College Algebra  bobpursley, Saturday, December 11, 2010 at 11:06am
By what method are you using. If not your calculator on matricies, then Irecommend the method of determinants.

College Algebra  Prakash, Saturday, December 11, 2010 at 4:24pm
Use simultaneous equation method:
x=yz1...(1)
Now, the equation 2 become:
2(yz1)+2y+5z=1
2y2z2+2y+5z=1
3z=1+2; z=3
Now equation 1 becomes
x=y31=y4; i.e, x=y4....(a)
equation 3 becomes:
5(y4)+2y+3(3)=8
5y20+2y+9=8
3y=19; y=19/3
Now the very first equation becomes
x+2(19/3)+3=1
x=13+38/3=38/32=12.72=10.7
hence x=10.2
Answer This Question
Related Questions
 College Algebra  Solve the system of equations. Then classify the system. 7x7y...
 College Algebra  Solve the system of equations using matrices. If system has no...
 College Algebra  Solve the system: 4x3y=3 y=6x13 What is the value of y in ...
 college Algebra  Solve the system, if possible. (If the system is inconsistent...
 College Algebra  I knew how to do this but forgot. Solve by the substitution ...
 college Algebra  Solve the system, if possible. (If the system is inconsistent...
 algebra  solve system graphically. be sure to check your solution. if a system ...
 Intermediate Algebra  Solve the following system of equations. x+4y=5 x=64y ...
 College Algebra  5x+y=7 6x+7y= 9 Solve for system of equations. What is the ...
 Algebra 1  Solve each system graphically. Be sure to check your solution. If a ...
More Related Questions