book Maths Puzzle Numerical Ability

Evaluate the fillowing if
c=2,d=-1,e=4 2c+3d

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book Other Question

Clear the Fraction first,if neccesary

7/2x+1/2x=3x+3/2+5/2x the base of a triangle is 3 times as long as its height. if the area of the triangle is 24 cm squared, find the length of the base and the height.