exam Maths Puzzle Numerical Ability

x=20
y= -34 124/435
z= -1993.023



(2^2X3) +81z-9y-2(2x+3-x)+(-9)(x-1/3-7+9z)
_______
4^1-1


I am pretty certain the first "X" is a multiplication symbol. It looks dif

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exam Other Question

The height of a triangle is 4cm less the length of the base. If the area is 30 square cm, what is the height and length of base. I know the formula and I plugged in numbers to find the answers (6cm + 10cm), but I cannot prove it algebraicly. find the value of y to make this a arithmetic sequence
y+8, 4y+6, 3y