exam Maths Puzzle Numerical Ability

Solve then graph 7x_>28
Of course the _ is supposed to be under the > Would it be a clear, or solid circle when graphing it?

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exam Other Question

The edges of three cubes are consecutive odd integers. If the cubes are stacked as shown the total exposed surface area is 381 cm2. Find the lengths of the sides of the cubes.

i need an equation for this pls.. Subtract. Express your answer in simplest form.

5x/20 - x/20