exam Maths Puzzle Numerical Ability

5/x+6 + 2/x^2+7x+6 = 3/x+1 solve equation for x

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exam Other Question

please help. using the quadratic formula x=-b= (with small dash under the plus sign) sqrt (b^2-4ac)/2a find the roots of the equation

6x^2+12x=-5 Thanks
Janet invested $31,000, part at 10% and part at 1%. If the total interest at the end of the year is $1,390, how much did she invest at 10%?

please help thanks