Question

1- Calcule as equações do 1° grau abaixo:
a) x + x + 5 = 8 +1
b) 2x + 2x - 4 = 16 + 2x
c) 2x - 2 = 12 -- 5x-x-2
d) 9x - 2 = - 4x + 18 + 9x
e) 4x - 18 + 3x = 10 + 5x​

Answer 1

Resposta:

a) x + x + 5= 8 + 1= 2x= 8-5+1= 2x= 3+1= 4 .. 2x= 4= x=4÷2= x= 2

b) 2x + 2x - 4 = 16 + 2x

4x-2x= 16+4= 2x= 20= x= 20/2= x= 10

c)2x - 2= 12 -5x-x-2

2x-5x-x= 7x-x=6x

6x= 12+2-2

6x= 14-2

6x= 12

x=12÷6= x= 2

d) 9x - 2= - 4x + 18 + 9x

9x+4x-9x= 18+2

13x - 9x= 18+2

4x= 20

x= 20÷4= x= 5

e) 4x - 18 + 3x = 10 + 5x

4x-3x+5x= 10 + 18

x+5x= 28

6x= 28

x= 28÷6

x= 4,66

Answer 2

Olá,

Vamos resolver as equações!

Letra A)

x + x + 5 = 8 +1

x + x = 8 + 1 - 5

2x = 4

x = 2

Letra B)

2x + 2x - 4 = 16 + 2x

2x + 2x - 2x = 16 + 4

2x = 20

x = 10

Letra C)

2x - 2 = 12 -5x-x-2

2x + 5x + x = 12 -2

8x = 10

10/8 ÷ 2 = 5/4

Letra D)

9x - 2 = - 4x + 18 + 9x

9x + 4x - 9x = 18 + 2

4x = 20

x = 5

Letra E)

4x - 18 + 3x = 10 + 5x

4x + 3x - 5x = 10 + 18

2x = 28

x = 14