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a-5=2a
2x+3=13
4z+3=47
8-5y=24+y
Soluções para a tarefa
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1
a)
a - 5 = 2a
- 5 = 2a - a
- 5 = a
a = - 5
****************************
b)
2x + 3 = 13
2x = 13 - 3
2x = 10
x = 10/2
x = 5
******************************
c)
4z+3=47
4z = 47 - 3
4z = 44
z = 44/4
z = 11
**********************
d)
8 - 5y = 24 + y
8 - 24 = y + 5y
- 16 = 6y
6y = - 16
y = - 16 (:2)
--------
6 (:2)
y = - 8
-----
3
a - 5 = 2a
- 5 = 2a - a
- 5 = a
a = - 5
****************************
b)
2x + 3 = 13
2x = 13 - 3
2x = 10
x = 10/2
x = 5
******************************
c)
4z+3=47
4z = 47 - 3
4z = 44
z = 44/4
z = 11
**********************
d)
8 - 5y = 24 + y
8 - 24 = y + 5y
- 16 = 6y
6y = - 16
y = - 16 (:2)
--------
6 (:2)
y = - 8
-----
3
sofiasasse15:
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