2years ago my mother was 4 times my age then. in 18 years i will be half my mothers new age. how old am i now?
i am so stuck 2 years ago sx4-m (s+18)=(m+18)/2 now what do i do

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%