An exactly determined system always has solutions.
False
No. An exactly determined system can have no solution, single solution or infinite solutions.For example,
x+y+z=3x+y+z=2x+y+z=1⎫⎪⎬⎪⎭no solutionx+0.y+0.z=00.x+y+0.z=00.x+0.y+z=0⎫⎪⎬⎪⎭infinite solution
Therefore given statement is false