Question

Vamos Praticar !!!
Atividades
1. Resolva as equações a seguir:
a)18x - 43 = 65
b) 23x - 16 = 14 - 17x
c) 4x + 9 = 2x - 8
d) 2 (x + 3) = 10
e) 15 + x = - 3x + 25
f) 13x - 16 = 14 - 17x
g) 3 (3x - 1) = 2 ( 3x + 2)
h) 7 (x-3) = 5 (2x + 3)
i) 3 (2x - 1) = -2(x+3)​ ​

Answer 1

A) 18.x - 43 = 65

18.x = 63 - 45

18.x = 18

x = $\frac{18}{18\\}$

x = 1

B) 23.x - 16 = 14 - 17.x

23.x + 17x = 14 + 16

40.x = 30

x = $\frac{30}{40} = \frac{3}{4}$

C) 4.x + 9 = 2.x - 8

4.x - 2.x = -8 - 9

6.x = -17

x = $\frac{-17}{6\\}$

D) 2.(x + 3) = 10

2.x + 6 = 10

2.x = 10 - 6

2.x = 4

x = $\frac{4}{2}$

x = 2

E) 15 + x = -3.x + 25

x + 3.x = 25 - 15

4.x = 10

x = $\frac{10}{4}$

F) 13.x - 16 = 14 - 17.x

13.x + 17.x = 14 + 16

30.x = 30

x = $\frac{30}{30}$

x = 1

G) 3.(3.x - 1) = 2.(3.x + 2)

9.x - 3 = 6.x + 4

9.x - 6.x = 4 + 3

3.x = 7

x = $\frac{7}{3}$

H) 7.(x - 3) = 5.(2.x + 3)

7.x - 21 = 10.x + 15

7.x - 10.x = 15 + 21

-3.x = 36

x = $\frac{36}{-3}$

x = -12

I) 3.(2.x - 1) = -2.(x + 3)

6.x - 3 = -2.x + 6

6.x + 2.x = 6 + 3

8.x = 9

x = $\frac{9}{8}$

Espero ter ajudado. Bons estudos !!!! ☺