Please answer correctly

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

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%