Question

valor do x??????????????

Answer 1

b) 2x - 4 = 3 - 6x
6x + 2x = 3 + 4
8x = 7
x = 7 sobre 8

c) 2x + 10 = 20
2x = 20 - 10
2x = 10
x = 10 sobre 2 = 5
x = 5



d) 2x + 2 = x + 10
x = 8

Answer 2

Oi

a)

x + 1 = 10

x = 10 - 1

x = 9

b)

2x - 4 = 3 - 6x

2x + 6x = 3 + 4

8x = 7

x = 7/8

c)

2x + 10 = 20

2x = 20 - 10

2x = 10

x = 10/2 ÷ 2

x = 5

d)

2(x+1)=x+10

2x + 2 = x + 10

2x - x = 10 - 2

x = 8

Bons estudos.