Question

resolva as questoes a seguir : equaçoes

a) x/2 (fraçao) = 3/5
b) 3x/10 (fraçao) = 1/4
c) x + x/2 (fraçao) =3
d) x - x/3 (fraçao) = 6
e) x/2 (fraçao) - x/3 = 1
f) x/3 (fraçao) - x/4 = 5
g) x = x/9 (fraçao) + 8
h) 2x/5 (fraçao) - 2 = x/4 + 4

Answer 1

Boa tarde Larab

a) x/2  = 3/5 
    5x/10 = 6/10
    5x = 6
    x = 6/5

b) 3x/10 = 1/4
    3x = 10/4
    12x = 10
    x = 10/12 = 5/6

c) x + x/2  = 3
    3x/2 = 3
    3x = 6
    x = 2

d) x - x/3  = 6
    2x/3 = 6
    2x = 18
    x = 9

e) x/2 - x/3 = 1
    3x/6 - 2x/6 = 6/6
    x = 6 

f) x/3 - x/4 = 5
   4x/12 - 3x/12 = 60/12
   x = 60

g) x = x/9 + 8 
    9x/9 - x/9 = 8
    8x/9 = 8
    x = 9

h) 2x/5  - 2 = x/4 + 4
    8x/20 - 40/20 = 5x/20 + 80/20
    8x - 40 = 5x + 80
    3x = 120
    x = 40