Question

resolva as equacoes 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 i)10=x+10 j)15=x=20 k)4=x-10 l)7=x+8 m)0= x+12 n)-3=x10

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

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

**********************************
i)
10 = x + 10
10 - 10 = x
0 = x
x = 0

*****************************
j)
15 + x = 20
x = 20 - 15
x = 5

*************************
k)
4 = x - 10
4 + 10 = x
14 = x
x = 14

***********************
l)
7 = x + 8
7 - 8 = x
- 1 = x
x = - 1

****************************
m)
0 = x + 12
0 - 12 = x
- 12 = x
x = - 12

*********************
n)
- 3 = x + 10
- 3 - 10 = x
- 13 = x
x = - 13