How many solutions does a system of linear equations in three variables have if in solving the system you correctly obtain the equation 12=12?

What could explain what happened when the time was equal to 120 minutes

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18