book Maths Puzzle Numerical Ability

please help me solve this.

2/3 (a-3)= -1/3
please show me how you do it..

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book Other Question

factorise on the left hand side 6x2-11x-3=0
(in english the question reads six ex squared minuss eleven minus three equals zero)
it would be great if you can e mail me the answer What is the slope of the binomial 24y+1