exam Maths Puzzle Numerical Ability

Please help me solve this problem. it says solve 3(x-1)-2(2x+5)=-(3x-3)

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exam Other Question

F(x)=3X^2-5x+3, Find [f(x+h)-f(x)}/h Find the value of (a+1)^-1 + (b+1)^-1 where a=(2+3^.5)^(-2005) & b =(2-3^.5)^(-2005)