exam Maths Puzzle Numerical Ability

1-2/3y=12/5-y/5 can you show me how to check it?

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exam Other Question

WHAT IS THE STANDARD FORM AND HOW DO TRANSFORM A PROBLEM IN TO STANDARD FORM? If f(x) = 5x^7 - 3, then f^-1(x) =

a. [(x + 7)/5]^1/3
b. [(x + 3)/5]^1/7
c. [(x + 5)/7]^1/3
d. [(x + 7)/3]^1/5
e. [(x + 3)/7]^1/5
f. [(x + 5)/3]^1/7
g. none of these