Question

1) resolvas as equações.
a) 3x + 5/2 - 1 =2x + 2



b)5x/3 + 4 = 3x + 4



c)a/2 + 3a - 1 = a + 1



d)2s + s/3 - 5 = 3 + 2s

Answer 1

a)
3x + 5/2 - 1 =2x + 2
3x - 2x = 2 + 1 - 5
                         -----
                           2

x = 3 - 5
          -----
            2

x = 6 - 5
     ---------
         2
x = 1/2

******************************
b)5x/3 + 4 = 3x + 4

 5x  - 3x = 4 - 4
-----
  3

5x     =  0 + 3x
-----
 3

5x = 3.3x
5x = 9x
5x - 9x = 0
- 4x = 0
x = 0/(-4)
x = 0

*********************************
c)
a/2 + 3a - 1 = a + 1
a  +  3a - a = 1 + 1
---
 2

 a    +  2a = 2
-----
  2

a + 4a =   4
--------     -----
   2            2

5a = 4
a = 4/5

*********************************
d)
2s + s/3 - 5 = 3 + 2s

 s   =  3 + 5
----
 3

 s      =   8
-----
  3

s = 3.8
s = 24