2000019206

Level: 
Project ID: 
2000019206
Accepted: 
0
Clonable: 
0
Easy: 
0
For what value of a real number \(a\) has the following system infinitely many solutions? \[ \begin{alignedat}{80} &x & + &2y & +& z & = 8 & & & & & & \\ &2x & & & -& z & = -1 & & & & & & \\ &7x & + & 10y & +& 4z & = a & & & & & & \\\end{alignedat}\]
\(39\)
\(73\)
\(-39\)
\(56\)