Question

resolva as equações a seguir a) 4y+56= -20 b) 12x+8x= -24 +18-2x c) x-12= x/3 d) 5x/3 -7= x/6+1/3 e)5a-1= 4(a-2) f) 12x+3(x-6)=2(4x-12)​

Answer 1

Resposta:

Explicação passo-a-passo:

a) 4y+56= -20

4y = - 20 - 56

4y = - 76

y = - 76/4

y = - 19

b) 12x+8x= -24 +18-2x

20x = - 6 - 2x

20x + 2x = - 6

22x = - 6 (:2)

11x = - 3

x= - 3/11

c) x-12= x/3

3(x-12) = x

3x - 36 = x

3x - x= 36

2x = 36

x = 36/2

x = 18

d) 5x/3 -7= x/6+1/3

Mmc (3,6)= 6

[2.5x-6.7]/6 = [1x + 2.1]/6

10x - 42 = x + 2

10x - x = 2 + 42

9x = 44

x = 44/9

e)5a-1= 4(a-2)

5a - 1 = 4a - 8

5a - 4a= - 8 + 1

a= - 7

f) 12x+3(x-6)=2(4x-12)

12x + 3x- 18 = 8x - 24

15x - 18 = 8x - 24

15x - 8x = - 24 + 18

7x= - 6

x = - 6/7