Question 12766
the equation would be 4n-2n=100
now you have to subtract 4n-2n which leaves you with 2n
now you have to divide both sides by 2
so 2n divided by 2 cancells out and leaves you with n
now you have 100 divided by 2 which will be 50
n=50

also you can check your work
try it....
4 times 50 is 200
2 times 50 is 100
200 minus 100 is 100


hope that helps you to understand