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=8p - 3 - 3p + 8
= 5p + 5
b. 9m + 4mn + (-12m) - 7m
= 9m + 4mn - 12m - 7mn
= - 3m - 3mn
c. 12kl - 20mn - 5kl - 3mn
= 6kl - 23mn
= 8p +(-3p) -3 +8
= 5p +5
b. 9m +4mn +(-12m) -7mn
= 9m +(-12m) +4mn -7mn
= -3m -3mn
c. 12kl -20mn -5kl -3mn
= 12kl -5kl -20mn -3mn
= 7kl -23mn
Itu jawabannya.