Question

Resolva as equações:
a) X + 5 = 8
b) X – 4 = 3
c) X + 6 = 5
d) X – 7 = - 7
e) X + 9 = -1
f) X + 28 = 11
g) X – 109 = 5
h) X – 39 = - 79

Answer 1

Resposta:

a) x = 3

x + 5 = 8 ∴ x = 8 - 5 ∴ x = 3

b) x = 7

x - 4 = 3 ∴ x = 3 + 4 ∴ x = 7

c) x = - 1

x + 6 = 5 ∴ x = 5 - 6 ∴ x = - 1

d) x = 0

x - 7 = - 7 ∴ x = - 7 + 7 ∴ x = 0

e) x = 8

x + 9 = - 1 ∴ x = - 1 - 9 ∴ x = - 10

f) x = - 7

x + 28 = 11 ∴ x = 11 - 28 ∴ x = - 7

g) x = 114

x - 109 = 5 ∴ x = 5 + 109 ∴ x = 114

h) x = - 40

x - 39 = - 79 ∴ x = - 79 + 39 ∴ x = - 40