Question

1) Resolva as seguintes equações (na incógnita x):

a) 5/x - 2 = 1/4 (x diferente.gif (293 bytes)0)

b) 3bx + 6bc = 7bx + 3bc

Answer 1

Resposta:

10×010×0×+029019#&£01(1000)

Answer 2

a) 5/x - 2 = 1/4 (x ≠ 0)

(20 - 8x)/ 4x = x/ 4x

20 - 8x = x

-8x = x - 20

-9x = -20

x = 20/9

b) 3bx + 6bc = 7bx + 3bc

3bx = 7bx + 3bc - 6bc

3bx - 7bx = - 3bc

-4bx = - 3bc

x = (3bc/4b)

x = 3c/4