Question

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

Answer 1

a) x + 5 = 8

x = 8 - 5

x = 3

b) x - 4 = 3

x = 3 + 4

x = 7

c) x + 6 = 5

x = 5 - 6

x = -1

d) x - 7 = -7

x = -7 + 7

x = 0

e) x + 9 = -1

x = -1 - 9

x = -10

f) x + 28 = 11

x = 11 - 28

x = -17

g) x - 109 = 5

x = 5 + 109

x = 114