resolva as equações
a) x+5:8
b) x-4:3
c)×+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+9
j)15:x+20
k)4:x-10
l)7:x+8
m)0:x+12
n)-3:x+10
Respostas
Resposta:
Explicação passo-a-passo:
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