Question 1039352
T+K = 9 and
T = K+3 subtract K on both sides and add to above:
T+K = 9
+
T-K = 3
2T = 12
T = 6 Tim is 6 and since he is  3 years older than his sister, the sister is:
6-3 = 3
Now, the problem says their ages add up to 9:
Tim 6
Sis 3
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Total:9 Correct