Question

a) + 12 = 15
b) 5 + X = 13
c)
- 8=3
d) X-10 = 4

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Answer 1

Resposta:

a) X=3

b) X=8

c) X=11

d) X=14

Answer 2

a) x + 12 = 15
15 - 12 = x
3 = x
x = 3

R.: x = 3


b) 5 + x = 13
13 - 5 = x
8 = x
x = 8

R.: x = 8


c) x - 8 = 3
8 + 3 = x
11 = x
x = 11


d) x - 10 = 4
10 + 4 = x
14 = x
x = 14

R.: x = 14