Question

20)Resolva as equações a seguir
a)6x + 2(x - 1)=14
b)4x -2(x - 5)=10
c) 3(x - 2) + 5 = 5
d) -x-3(x-3)=3
e) 3x + 4(x + 2) = 2(x + 9)
f) 2(x - 6) + 7x=5 - 3(x - 2)​

Answer 1

Resposta:

A) 6x + 2x - 2 = 14

8x = 14 + 2

X = 16/8

X = 2

B) 2x - 2x + 10 = 10

x = 10 - 10

x = 0

C) 3x -6 + 5 = 5

3x = 5 + 6 -5

3x = 6

X = 6/3

X = 2

D) -X -3x + 9 = 3

-4x = 3 - 9

- 4x = -6 (multiplica por -1)

4x = 6

X = 6/4

X = 3/2

E) 3x + 4x + 8 = 2x + 18

7x - 2x = 18 - 8

5x = 10

X = 10/5

X = 2

F) 2x - 12 + 7x = 5 - 3x - 6

9x + 3x = 12 - 6 + 5

12x = 11

X = 12/11