Question

1)resolva as equaçoes:
a)3(x+2)+5-x+12

b)x+4(x-1)=9-2(x+3)

c)5(3x-2)=2(6×+3)

d)2(3×-1)+2(3-×)=e

e)7(×-1)=2(3×+1)

f)2(3-×)+7(2-×)=15-4×

g)2(×-2)+5(2-×)+6(×+1)=e

h)3(×-2)-(1-×)=13

i)e-(×+1)=12-(3×-2)

j)10y-5(1+y)=3(2y-2)-20

Answer 1

Resposta:

Vamos la..

Explicação passo-a-passo:

a) 3(x + 2) + 5 = x + 12

3x + 6 + 5 = x + 12

3x - x = 12 - 11

2x = 1

x = 1/2

b) x + 4 (x - 1) = 9 - 2( x + 3)

x + 4x - 4 = 9 -2x - 6

5x + 2x = 3 + 4

7x = 7

x = 7/7

x = 1

c) 5(3x - 2) = 2(6x + 3)

15x - 10 = 12x + 6

15x - 12x = 6 + 10

3x = 16

x = 16/3

x = 5,3

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

6x -1 + 6 - 2x = 3

4x = 3 - 5

4x = - 2

x = -2/4

x = - 0,5

e) 7( x - 1) = 2(3x + 1)

7x - 7 = 6x + 2

7x - 6x = 2 + 7

x = 9

f) 2(3 - x) + 7 ( 2 -x ) = 15 - 4x

6 - 2x + 14 - 7x = 15 - 4x

- 9x + 4x = 15 - 20

- 5x = - 5

× = -5/-5

x = 1