Question

Determine o valor de x: (perguntas na foto)

Answer 1

Pelo Teorema de Tales:

e) 5/3+5 = 20/x
5/8 = 20/x
5x = 20.8
x = 32

f) 8/8+6 = 4/x
8/14 = 4/x
8x = 4.14
x = 7

g) x/30 = 7/15
15x = 30.7
x = 14