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lisov135 [29]
3 years ago
12

X = [?]

Mathematics
1 answer:
Alexxandr [17]3 years ago
3 0
Answer: x = 21

Explanation:

3x + 18 + 4x + 15 = 180

7x + 33 = 180
7x = 180 - 33
7x = 147
x = 21
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