Question

iam want answer of this question

Answer 1

1 )) 3mn+(-5mn)+8mn+(-4mn)
=3mn-5mn+8mn-4mn
=11mn-9mn
=2mn

2)) t-8tz +3tz -z +z-t
= -5tz

please solve other questions also likewise u just have to add them take the like variables together and just solve them...