exam Maths Puzzle Numerical Ability

Ok. Here is an example of a math problem that I cannot understand. -5/6q-(q-1/2)=1/4(q+1). How do I do this type of problem?

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exam Other Question
If I made a cube from a 1" wide by 7" long strip of paper, how would i find the area of the cube? can someone help me with these problems:

(9x+2)=5[11-2(2-x)+3]