Question

Resolvam p mim essa equação:
a) 3(x-3) -5(2x-5)=21+(x+6)

Answer 1

3.(x -3) - 5.(2x - 5) = 21 + (x + 6)
3x - 9 - 10x + 25 = 21 + x + 6
3x - 10x - 9 + 25 = 21 + 6 + x
- 7x + 16 = 27 + x
16 - 27 = x + 7x
- 11 = 8x
8x = - 11
x = - 11
         8
-----------------------------------

b) x/3 + x-1/4 = x/2 -2

x + x - 1  =  x  - 2
3       4        2

4x + 3(x - 1) = 6x - 24
     12               12

4x + 3x - 3 = 6x - 24
7x - 3 = 6x - 24
7x - 6x = - 24 + 3
x = - 21
---------------------------------------------------------
3,4,2: 2
3,2,1: 2
3,1,1: 3
1,1,1  =  2.2.3 = 4.3 = 12