Question

determine o valor desconhecido

a)x+0,38=2,04
b)3,28-x=109
c)4,02+x=6,85
d)x-8,72=3,5

Answer 1

a) x +0,38 = 2,04
    x = 2,04 - 0,38
    x = 1,66
 

b) 3,28 -x = 109
    -x = 109 - 3,28
    -x = 105,72 (-)
     x = -105,72  
 

c) 4,02 +x = 6,85
    x = 6,85 - 4,02
    x = 2,83
 

d) x -8,72 = 3,5
    x = 3,35 + 8,72
    x = 12,07