To determine a sum of exactly two terms that is equivalent to -3(9-7m), we can use the distributive property of multiplication:
[tex]a\cdot(b+c)=a\cdot b+a\cdot c[/tex]Then,
[tex]-3(9-7m)=-27+21m[/tex]The sum of -27 and 21m is equivalent to -3(9-7m).