exam Maths Puzzle Numerical Ability

If each side of a square is lengthened by 4m, the area becomes 49m^2.Find the length of a side of the original square

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exam Other Question

Solve by substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent.

3x � 4y = 0
2y = x + 1 L has y intercept (0,2) and is perpendicular to line with equation 2x-3y=6?