exam Maths Puzzle Numerical Ability

2x-y-z=-3
x-2y+3z=6
x+y+z=6
use matrices to solve thank you

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exam Other Question

Solve the system of equations by graphing. Then classify the system as consistent or inconsistent and the equations as dependent or independent.

3x-y=6
3x+4y=-9

I am so lost on how do this problem, please help! Please help me multiply the following.

8pq^2(2pq - 3p +5q)

Thank you for helping me out.