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adelina 88 [10]
4 years ago
10

A) 28° b) 142° c) 128° d) 62°

Mathematics
1 answer:
Serjik [45]4 years ago
3 0
360 - 4x - (x+40) - (x+10) = A
A = 360 - 4x - x - 40 - x - 10
A = 310 - 6x


A = 142
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