Question

Gente como faz essas contas ?

N/3=5

3(x-2)=x+6x+1

2x+5+1=2(2x+1)

5x/6=4

Answer 1

N/3=5

N
--- = 5
3

N = 3(5)
N = 15


3(x-2)=x+6x+1
3x - 6 = 7x + 1
3x - 6 - 7x = 1
3x - 7x = 1 + 6
- 4x = 7
x = 7/-4
x = - 7/4

2x+5+1=2(2x+1)
2x + 6 = 4x + 2
2x + 6 - 4x = 2
2x - 4x = 2 - 6
- 2x = - 6
x = -6/-2
x = + 6/2
x = + 3


5x/6=4

5x
------ = 4
6

5x = 6(4)
5x = 24
x = 24/5

Answer 2

Olá,

N/3=5
N=5·3
N=15

3(x-2)=x+6x+1
3x-6=7x+1
3x-7x=1+6
-4x=7 (-1)
4x=-7
x=-7/4

2x+5+1=2(2x+1)
2x+6=4x+2
2x-4x=2-6
-2x=-4
x=-4/-2
x=2

5x/6=4
5x=24
x=24/5

Espero ter te ajudado!