Answer:
0 (zero)
Explanation:
15mn + 5(m – 3mn) – 5m
=15mn+5m-15mn-5m
=15mn-15mn+5mn-5mn
=0
3n add 1
15 mn add 5m - 15mn - 5m
or, 5m( 3n add 1 ) - 5m( 3n add 1)
or, ( 5m - 5m ) ( 3n add 1 )
or, 3n add 1
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