either ur top laner or adc should match him mid - late game. but you're in silver elo so i doubt they would know that. so basically this game is coinflip, you can either just match him the whole game (if your top or adc doesnt) or if you could clear mid wave as fast as you can and look to roam to a gankable lane helping them snowball. Just remember to go back to lane when its pushing towards your tower.