Question

obtenha o valpr de x nas questoes 1 - 8
1) 2 x + 6 = x + 18
2) 5 x-3 = 2 x + 9
3) 3(2x-3)+2(x+1)=3x+18
4) 2x + 3 (x - 5) = 4x + 9
5) 2 (x + 1) - 3 (2x - 5) = 6x-3
6) 3x - 5 = x-2
7)x/2+1-x/5=1/2
8)x+3/2+x+2/3=-1/2​

Answer 1

Resposta:

1 = 12

2= 4

3= 5

4= 24

5= 2

6= 3/2

Explicação passo-a-passo:

1) 2x - x = 18 - 6

x=12

2)5x - 2 x = 9+3

3x = 12

x= 4

3) 6x - 9 + 2x + 2 = 3x + 18

6x + 2x - 3x = 18+ 9 -2

5x = 25

x=5

4) 2x +3x - 15 = 4x + 9

5x - 4 x = 9 + 15

x = 24

5) 2x +2 - 6x + 15 = 6x - 3

2x - 6x -6x = -3 - 15 - 2

-10x = -20

x= 2

6) 3x - x = -2 +5

2x = 3

x = 3/2