Question

Calcule x:
A)x-2/x=12/20
B)0,6/2x=0,9/6
C)x+1/x=1/3
D)5/x+3=2/7,3
Gente pelo amor de Deus me ajudem!

Answer 1

A)x-2/x=12/20 20.(x-2) = 12.(x) 20x-40 = 12x 20x-12x = 40 8x = 40 x = 40/8 x = 5 B)0,6/2x=0,9/6 0,6.(6) = 2x.(0,9) 3,6 = 1,8x 1,8x = 3,6 x = 3,6/1,8 x = 2 C)x+1/x=1/3 3.(x+1) = 1.(x) 3x+3 = × 3x-x = -3 2x = -3 x = -3/2 x = -1,5 D)5/x+3=2/7,3 2.(x+3) = 7,3.(5) 2x+6 = 36,5 2x = 36,5 - 6 2x = 30,5 x = 30,5/2 x = 15,25