Question

Resolva As Seguintes Equações: a)×+5=8 b)×-4=3 c)×+6=5 d)×-3=7 e)×+9=-1 f)×+28=11 g)×-109=5 h)×-39=-79 i)10=×+9

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-3=7
x=7+3
x=10

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

h)x-39= -79
x= -79+39
x= -40

i)
10=x+9
10-9=x
1=x

Answer 2

a) x+5=8 b)x-4=3 c)x+6=5 d) x-3=7
x=8-5=3 x=3+4=7 x=5-6=-1 x=7+3=10

e) x+9=-1 f) x+28=11 g) x-109=5
x=-1-9=-10 x=11-28= -17 x=5+109=114

h) x-39=-79 i) 10= x+9
x=-79+39= -40 -x=9-10=1 (-1)
x=-1