What equation is the result of solving 7+4x=3y for x

Write the factored form of this trinomial 9x^2+18x-7

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work

Who can me with this algebra for your guys.