exam Maths Puzzle Numerical Ability

How do I solve:

x(squared)+5x=8x+40

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exam Other Question

Determine whether the following equations have a solution or not? Justify your answer.
a) 5x2 + 8x + 7 = 0
b) (7)1/2y2 - 6y - 13(7)1/2 = 0
c) 2x2 + x - 1 = 0
d) 4/3x2 - 2x 1/4(3x+1)=2(2x-4)-8, Is 13/3 a solution to y over 2-7 over 9=y over 6 plus 2 over 3, 2.2.a.a.a.b, (2 over 5xy to the3rd power)(1 over 3 xto the sencond power and y to the second po