exam Maths Puzzle Numerical Ability

Could you please tell me how to solve this problem?

Solve the system of equations by using matrices.

3X-6Y=3
-2X+3Y=_4

thanks.

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exam Other Question

Please solve my assignment. Thanks.
A smaller cylinder has a radius of 2 and its height is 7. The radius of the bigger cylinder is 6 and its height 21. Determine the ratio of both c^2+19c+60

factor the above