Solve the system of equations:
3a+b+c+d+e+f=43 a+3b+c+d+e+f=51 a+b+3c+d+e+f=61 a+b+c+3d+e+f=32 a+b+c+d+3e+f=81 a+b+c+d+e+3f=52
Here's a matrix solution:
+179 
