Try and solve this math problem

Mathematics

1 answer:

uranmaximum [27]3 years ago

6 0

BC = x

AB = BC - 6

AC = BC + (BC - 6) - 13 = 2BC - 19

AB + AC + BC = 78

substitute:

(BC - 6) + (2BC - 19) + BC = 78

4BC - 25 = 78 |+25

4BC = 103 |:4

BC = 25.75

Answer: 25.75 mm

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