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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exam Other Question

Graph each compound or absolute value inequality.
x+y less than equal to 1 or y less than equal to 4 Resolve 7-8x/(1-x)*(2-x)into partial fractions.Hence find the expansion of the function in ascending powers of x as far as three nonzero terms. State for which values of x this expansion is valid

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