i did it using augmented matrix form... and than using reduced row echelon method.. which gave rank(a) =rank(a|b)= 3(no. of variable) = so i found that its consistent and has unique solution..

"If a consistent system has an infinite number of solutions, it is dependent . When you graph the equations, both equations represent the same line. If a system has no solution, it is said to be inconsistent ."