Question

Resolva as equações a seguir:
a) 18x - 43 = 65
b) 23x - 16 = 14 - 17x
c) 3x - 2x = 10
d) x + 4x = 25

Answer 1

Resposta:

a) 18x - 43 = 65

18x = 65 + 43

18x = 108

x = 108/18

x = 6

b) 23x - 16 = 14 - 17x

23x + 17x = 14 + 16

40x = 30

x = 30/40

x = 3/4

x = 0,75

c) 3x - 2x = 10

x = 10

d) x + 4x = 25

5x = 25

x = 25/5

x = 5

Espero ter ajudado! :D

Answer 2

a)

$18x - 43 = 65 \\ 18x = 43 + 65 \\ 18x = 108 \\ x = \frac{108}{18} \\ x = 6$

b)

$23x - 16 = 14 - 17x \\ 23x + 17x = 14 + 16 \\ 40x = 30 \\ x = \frac{30}{40} = \frac{3}{4}$

c)

$3x - 2x = 10 \\ x = 10$

d)

$x + 4x = 25 \\ 5x = 25 \\ x = \frac{25}{5} \\ x = 5$