exam Maths Puzzle Numerical Ability

can someone PLEASE help me solve this system:
{ x+ y-4z=6
{2x-5y+3z=2
{ x-6y+7z=-4
thank you so much!

Read Solution (Total 0)

exam Other Question

1) Write a quadratic equation having the given numbers as solutions
-10 and -5 Perform the indicated operation.

19-17
_________
(6)(6)-36

This is also a fraction. Would this be Undefined because the bottom number = 0?