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Inessa05 [86]
4 years ago
10

Maths question: 30 POINTS

Mathematics
1 answer:
nevsk [136]4 years ago
3 0

Answer:

A = (1/2)(B + C + D) ⇒ 2A = B + C + D

B = (1/3)(A + C + D) ⇒ 3B = A + C + D

C = (1/4)(A + B + D) ⇒ 4C = A + B + D

D = 78

Substitute 78 for D. Solve the three equations in three variables

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