exam Maths Puzzle Numerical Ability

please help me with this problem
ive been working on it for 15 min already

the problem is
2(x-4)=22

i have to solve for x
i cant get the anwser at all

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exam Other Question

A coffee merchant has coffee beans that sell for $9 per pound and $12 per pound. The two types are to be mixed to create 100lb. of a mixture that will sell for $11.25 per pound. How many of each type of bean should be used in the mixture? Given the function k describe by k(x) = x + 16 Find each of the following:
k(0)=
k(-15)=
k(-20)=
Help there are 3 more questions, but I am hoping to do them myself after someone explains to me how it is done please.