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f. 12kl - 5kl - 20mn - 3mn = 7kl - 23mn
g. 4m - 6m - 5 + 8 = -2m + 3
i. -16a - 6b - 4a + 9b = - 16a - 4a - 6b + 9b = -20a + 3b
f.12kl - 20mn - 5kl - 3mn = 12kl - 5kl - 20mn - 3mn = 7kl - 23mn
g.4m - 5 - 6m + 8 = 4m - 6m - 5 + 8 = -2m + 3
i.2(-8a - 3b) - 4a + 9b = -16a - 6b - 4a + 9b = -16a - 4a - 6b + 9b = -20a - 3b
Ok,itu jawabanya..........^_~