Question

resolva a equação,sendo U = Q
x+2x+3-5x=4x-9
5x+6x-16=3x+2x-4
5x+4=3x-2x+4

Answer 1

a)
x + 2x + 3 - 5x = 4x - 9
3x + 3 - 5x = 4x - 9
3x - 5x + 3 = 4x - 9
- 2x + 3 = 4x - 9
- 2x - 4x = - 9 - 3
- 6x = - 12  (-1)
6x = 12
x = 12/6
x = 2
---------------------------------------------
b)
5x + 6x - 16 = 3x + 2x - 4
11x - 16 = 5x - 4
11x - 5x = - 4 + 16
6x = 16 - 4
6x = 12
x = 12/6
x = 2
-------------------------------------------------
c)
5x + 4 = 3x - 2x + 4
5x + 4 = x + 4
5x - x = 4 - 4
4x = 0
x =  0/4
x = 0
---------------------------------------------------

Answer 2

a)x+2x+3-5x=4x-9
x +2x -5x -4x = -9 -3 
3x -9x = -12
-6 x= -12 .(-1)
x= 12/6

b)5x+6x-16=3x+2x-4
11x -3x -2x = -4 +16
8x -2x = 12
6x= 12
x= 12/6

c)5x+4=3x-2x+4
5x -3x +2x = 4 -4
2x +2x = 0
4x= 0
x= 0/4

Quando Q=U , as respostas devem vir em fração.

Bons estudos!