HelP meEeEeeeEe

Agrocery store has 12 lb of trail mix that is 10% banana chips. the store's manager would like to add banana chips to bring the new mix up to 25% banana chips. write and solve a system of equations to find out how many pounds of banana chips manager needs to add.

Me what is the value of x? showing work would be appreciated - ! : )

What is the measure of angle x? 37° 82° x°