Boa noite, a) w + 12 - 3 = 15 w + 9 = 15 w = 15 - 9 w = 6
b) 32 : x = 8 32 = 8x 32 : 8 = x 4 = x x = 4c) 92 - r = 50 - r = 50 - 92 - r = - 42 (- r = - 42) . -1 r = 42d) 7 . 8 - p = 46 56 - p = 46 - p = 46 - 56 - p = - 10
(- p = - 10) . -1 p = 10
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Boa noite,
a) w + 12 - 3 = 15
w + 9 = 15
w = 15 - 9
w = 6
b) 32 : x = 8
32 = 8x
32 : 8 = x
4 = x
x = 4
c) 92 - r = 50
- r = 50 - 92
- r = - 42
(- r = - 42) . -1
r = 42
d) 7 . 8 - p = 46
56 - p = 46
- p = 46 - 56
- p = - 10
(- p = - 10) . -1
p = 10