exam Maths Puzzle Numerical Ability

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

3x � 4y = 0
2y = x + 1

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exam Other Question

1/18h^2-1/2h+1=0

Solve each equation- I am not sure how to get started on this problem. HELP Please 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