exam Maths Puzzle Numerical Ability

for i= square root -1, if 3i(2+5i)=x+6i, then x=?

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exam Other Question

The length of a rectangle is 2cm more tham twice its width. If the perimeter of the rectangle is 52cm find the dimensions of the rectangle Help I cannot get this :)
Find values for m and b in the following system so that the solution to the system
is (3, 4).
5x+7y=b
mx+y=22