Question

2)resolva as equações
a)5×-3×=16
b)×+×-8=54
c)7×-2-5×=18
d)12×-10×+4=2
e)×+2×-4=11​

Answer 1

Resposta:

a) 5x +3x = 16

8x = 16

x = 16/8

x = 2

b) x+x+8=54

2x=54-8

2x = 46

x = 46/2

x = 23

c) 7x-2-5x=18

7x-5x = 18+2

2x = 20

x = 20/2

x = 10

d) 12x-10x-4=3

12x-10x=3+4

2x = 7

x = 7/2

e) -x-2x-4=11

-x-2x = 11+4

-3x = 15 (.-1)

3x = -15

x = -15/3

x = -5

f) 8x=5x+4,5

8x-5x = 4,5

3x = 4,5

x = 4,5/3

x = 1,5