exam Maths Puzzle Numerical Ability

3/7x + 5/9y = 27
1/9x + 2/7y = 7
Solve each system by the addition method
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18. $26,000 was divided and placed in three differnt accounts. Twice as much was put into an account earning 7% per year as was put into an account earning 6% per year. The rest wa If x - 3(x-2)= 4(x + 1)-8,then x =

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