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kirza4 [7]
3 years ago
9

3. TU = 2x, UB = 3x + 1, TB = 21

Mathematics
1 answer:
user100 [1]3 years ago
4 0

TU + UB = TB

2x + 3x + 1 = 21

5x = 21 - 1

5x = 20

x = 4

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