Question

Resolva as equações: (entre parênteses está a resposta, só quero o calculo)

a) x/2-x/4=1/2 (2)

b) x/2-x/4=5 (20)

c) x/5+x/2=7/10 (1)

d) d/5+1=2/13 (15/7)

e) x/2+x/3=1 (6/5)

f) 43+4=2x (12/5)

Answer 1

a) x/2-x/4=1/2 (2)

2x/4 - x/4 = 2/4

2x - x = 2

x = 2

b) x/2-x/4=5 (20)

2x/4 - x/4 = 20/4

2x - x = 20

x = 20

c) x/5+x/2=7/10 (1)

2x/10 + 5x/10 = 7/10

7x/10 = 7/10

x = 1

d) d/5+1=2/13 (15/7)

d/5 = -1 + 2/13

d/5 = -11/13

d = -55/13

e) x/2+x/3=1 (6/5)

   3x/6 + 2x/6 = 6/6

   5x = 6

   x = 6/5

f) 43 +4=2x (12/5)

  47 = 2x

 x = 2/47