Simplify the following text for a Grade 9 native English-speaking person.
Original: In some rock or metal bands with two guitarists , the two performers may perform as a `` guitar tandem '' , and trade off the lead guitar and rhythm guitar roles , or both guitarists can play the same role ( `` dual lead guitars '' or `` dual rhythm guitars '' ) .
Simplified: Two guitarists may perform as a guitar tandem , and trade off the lead guitar and rhythm guitar roles . Alternatively , two or more guitarists can share the lead and rhythm roles throughout the show , or both guitarists can play the same role ( `` dual lead guitars '' or `` dual rhythm guitars '' ) .