exam Maths Puzzle Numerical Ability

Solve 3/5b +1 = 1/2b +0.4

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exam Other Question

X^2 -4 DIVIDED BY 4X-8 - BOTH NUMBERS ARE OVER X Factor x^-1/3 out of x^1/3 + x^-1/3
I multiplied x^1/3 by x^-1/3 and got x^-1 and then factored out the x^-1/3 and my answer i got was x^-1/3(i/x + 1) is this correct