Question

7-n-3n

Answer 1

i hate math!!!

Answer 2

7 -4n

Answer 3

I love maths :)

Answer 4

add/subtract like terms

Answer 5

easy for u to say

Answer 6

Haha no actually I am a pre-medical student. I don't even study Maths anymore. Kinda miss it :D

Answer 7

hey ar i answered ur qstn

Answer 8

how do u miss that cruelty to mankind

Answer 9

:D Which grade are you in?

Answer 10

6th

Answer 11

me? passed 12th

Answer 12

No actually help!! but yea good to know :)

Answer 13

how do u remember thiss

Answer 14

you're looking for things with common factors. -n,-3n both have an n so we can write the terms as n(-1-3). we know -1-3=-4, so we have -4n. 7-4n. Think about 3*5-6*5=15-30=-15. That is also 5*(3-6)=5*-3=-15. three 5's minus six 5's is negative three 5's. works the same if you replace 5 by some variable.