exam Maths Puzzle Numerical Ability

Please help me find the inverse of the function.
f(x)= (-5+5x)/(3-x)

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exam Other Question

I know this is not the type of question i wrote but i thought it was close .

solve x over 4 = x+2 over 5

a. x= 8
b. x= 7 over 2
c. x= 2
d. x= -10 Plwase help, I am to simplify and all exponents should be positive

Thanks, Lackinmath

(3x4y^3-5y)-(2x+3y^3-5y)