Question

Determine o valor de x na equação a seguir:

a)5 - 2 x 3 = -8 + 4 x -2

b)5 x +3 + 2 x - 4 + 3 x + 8 = -13

c) 2.(x+3) = 10

d) 4. (x-2) = 3 x

Answer 1

Resposta:

a) 5-2x+3=-8+4x-2

-2x-4x=-2-8-3-5

-6x=-18

-x=-18/6

-x=-3 . (-1)

x=3

b) 5x+3+2x-4+3x+8=-13

5x+2x+3x=-13-8-3+4

10x=-20

x=-20/10

x=-2

c) 2.(x+3)=10

2x+6=10

2x=10-6

2x=4

x=4/2

x=2

d) 4.(x-2)=3x

4x-8=3x

4x-3x=8

x=8

Answer 2

Explicação passo-a-passo:

a)

5 - 2x + 3 = -8 + 4x - 2

8 - 2x = 4x - 10

4x + 2x = 8 + 10

6x = 18

x = 18/6

x = 3

b)

5x + 3 + 2x - 4 + 3x + 8 = -13

5x + 2x + 3x + 3 - 4 + 8 = -13

10x + 7 = -13

10x = -13 - 7

10x = -20

x = -20/10

x = -2

c)

2.(x + 3) = 10

2x + 6 = 10

2x = 10 - 6

2x = 4

x = 4/2

x = 2

d)

4.(x - 2) = 3x

4x - 8 = 3x

4x - 3x = 8

x = 8