exam Maths Puzzle Numerical Ability

I need find the inverse of the following function:
f(x)=2(x+12).

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exam Other Question

1.write the following meassurements in scientfic

a. 800 000 000m

b. 0.0015kg

c. 600 200L

d. 0.00095m

e 8 002 000km
f.0.000 000 000 06kg 24 is divided into two parts such that 7 times the first part added to 5 times the second part makes 146.find each part