exam Maths Puzzle Numerical Ability

True or False: it is possible to add a 3*3 matrix to a 3*5 matrix? thanks

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Please help me;
Solve the equation 4^2x+1=2^3x+6
Please help me solve my assignment. Thank you.
Points K, L and M are collinear and the coordinates of L is greater than the coordinate of K. If KM = ML = 6, and the coordinate of M is 3. What are the coordinates of K and L?