exam Maths Puzzle Numerical Ability

Write an expression for the surface area of each cube. each side on one cube has a length of 2x. And on the other cube each side is 4x.

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please help me solve these problems:
3/4 (7k - 5)=12

5(3-x)< 3(x-3)

3x + 2 < 5
Write the equation of the line passing through each of the given pairs of points. Write your result in slope-intercept form, where possible.

(2, -3) and (2, 4)