Question

01) Nas figuras , calcule X , sabendo que A // B // C :

Answer 1

Resposta:

Teorema de Tales

a)

${3\over4}={x\over8}\\ \\ 4x = 24\\ \\ x={24\over4}\\ \\ x=6$

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b)

${12\over2x-2}={21\over3x+1}]\\ \\ 21.(2x-2)=12.(3x+1)\\ \\ 42x-42=36x+12\\ \\ 42x-36x = 12+42\\ \\ 6x=54\\ \\ x={54\over6}\\ \\ x=9$