exam Maths Puzzle Numerical Ability

Solve the system of linear equations by the substitution method.
5x + 4 y = 14
15x � 2y = 7

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exam Other Question

If AD=(x+6)cm, AB=5cm and the perimeter of ABCD is 26cm, find the area of rectangle ABCD. if f (x) = 5x - 1, find the following:

f (a - 2)