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olga2289 [7]
3 years ago
12

Solve: 12/35 − 5/21 a. 11/105 b. 3/7 c. 61/105

Mathematics
1 answer:
Otrada [13]3 years ago
6 0

Answer:

a: 11/105

Step-by-step explanation:

Simplify the following:

12/35 - 5/21

Put 12/35 - 5/21 over the common denominator 105. 12/35 - 5/21 = (3×12)/105 + (5 (-5))/105:

(3×12)/105 + (5 (-5))/105

3×12 = 36:

36/105 + (5 (-5))/105

5 (-5) = -25:

36/105 + (-25)/105

36/105 - 25/105 = (36 - 25)/105:

(36 - 25)/105

| 3 | 6

- | 2 | 5

| 1 | 1:

Answer: 11/105

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answer 
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