Question 1 [30 pts]: Consider the following system of linear equations
x_(1) x_(2) 8x_(3)=10
2x_(1) x_(2) x_(3)=4
x_(1) x_(2)-x_(3)=1(a) [10 pts] Determine whether
(1,2,8)is a solution to the given system. (b) [20 pts] Solve the given system using the method of elimination.