Although all of the following systems can be solved via the substitution method, the substitution would be the best method for solving which system?

y = 3x + 1

y = 3x - 5

y = 2x + 3

2x + y = 5

0.5t - w = 2.5

2t + 3w = 4

3x + 2y = 18

4x + 5y = 60

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%