If a= -3 + 2 and b= 5n- 7, what is the value of a-b in simplest form

The first step to solving this is to put the expression given for a into the a spot on a - b(-3n + 2) - bnow plug in the expression given for b in the b spot of a - b(3n + 2) - (5n - 7)the first step to solving this is to remove the first set of parenthesis3n + 2 - (5n - 7)when there is a  "-" sign in front of the parenthesis,, you need to change the sign of each term in the parenthesis in the second set.3n + 2 - 5n + 7now you'll need to  collect the like terms,, in this case we will first collect the numbers with  n  next to them-2n + 2 + 7finally,, collect the other like terms together by simply adding them together-2n + 9this means that the correct answer to you question is -2n + 9.let me know if you have any further questions: )

Plug in -3n + 2 for a, and 5n - 7 for b(-3n + 2) - (5n - 7)-3n - 5n = -8n2 - (-7) = 2 + 7 = 9-8n + 9 is your answerhope this