exam Maths Puzzle Numerical Ability

Could someone please help me with the following problem:

Solve using matrices:

x + 2y -z =2
2x -2y + z =-1
6x +4y =3Z = 5

Thank You
RF

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exam Other Question
shimaran is twice as ols as her son.in four years she will be four times as old as her son was 9 years ago. how old is each now tutor could you help me please..my problem is: Solve (X1/5)^3

Thank you