Question

resolva as seguintes equações;

a)
$x - 3 = 7$
B)
$3x = 12$
C)
$7x - 1 = 13$
D)
$7(x - 2) = 5(x + 3)$

​

Answer 1

Resposta:

a) x - 3 = 7

x = 11

b) 3x = 12

x = 4

c) 7x - 1 = 13

7x = 14

x = 2

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

7x - 14 = 5x + 15

7x - 5x = 29

2x = 29

x = 14,5