Question

Resolva as equações abaixo:

a) 10x – 30 = 0







b) 8x + 24 = 2x

c) - 4x – 15 = 45 + 6x







d) 7x + 31 = 2x + 81

Answer 1

resposta

a) 10x – 30 = 0

10x = 30

x=30/10

x=3

b) 8x + 24 = 2x

8x-2x= -24

6x= -24

x= -24/6

x= -4

c) - 4x – 15 = 45 + 6x

-4x-6x= 45+15

-10x= 60

x= 60/-10

x= -6

d) 7x + 31 = 2x + 81

7x-2x= 81-31

5x=50

x =50/5

x=10