How to write six times the square of a number

Read the following two statements. then use the law of syllogism to draw a conclusion. if the tv is too loud, then it will give me a headache. if i have a headache, then i will have to rest.

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)