Question

7) calcule o valor de X em cada triângulo ​

Answer 1

Resposta:

a) 6/(6 + 15) = 8/[8 + (x + 7)]

6/21 = 8/(15 + x)

6 × (15 + x) = 21 × 8

90 + 6x = 168

6x = 168 - 90

6x = 78

x = 78/6

x = 13

b) 6.5/(6.5 + 11) = 2x/(2x + 3x +1)

6.5/17.5 = 2x / (5x + 1)

6.5 × (5x + 1) = 17.5 × 2

32.5x + 6.5 = 35x

35x - 32.5x = 6.5

2.5x = 6.5

x = 6.5/2.5

x = 2.6