Question

resolva as equações
a) 9x=81
b)24+6-19+x=26
c)x+1/2=55
d)500-400x=299+1
e)14x+13-6=46+x​

Answer 1

Olá...

Resolva as equações  

a)

9x = 81

x = 81/9

x = 9

b)

24+6-19+x=26

30 - 19 + x = 26

11 + x = 26

x = 26 - 11

x = 16

c)

x + 1/2 = 55

x = 55 - 1/2⇒mmc = 2

x =  110 - 1/2

x = 109/2

d)

500 - 400x = 299 + 1

500 - 400x = 300

- 400x = 300 - 500

- 400x = - 200 ⇒( - 1)

400x = 200

x = 200/400 ÷ 200

x =  1/2

e)

14x + 13 - 6 = 46 + x

14x + 7 = 46 + x

14x - x = 46 - 7

13x = 39

x = 39/13

x = 3

Bons estudos.​