Question

qual o valor de x:
a) 2x - 5= 3x + 35
b) 4x/3 - 8= 42 - 2x

Answer 1

A) 2x -3x= 35+5
-x= 40
x=-40
B) 4X/3+2X= 42+8
vamos tirar mmc
4x+6x= 126+24
10x= 150
x=150/10
x= 15

Answer 2

a)
2x - 5= 3x + 35
- 5 - 35 = 3x - 2x
- 40 = x
x = - 40
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)
4x/3 - 8= 42 - 2x

4x  + 2x = 42 + 8
----
  3

4x  + 2x = 50
-----
  3

4x + 3.2x = 3.50
-------------   -------
     3               3

4x + 6x = 150
10x = 150
x = 150/10
x = 15