Question

determine o valor de x
A)15x-2x=20-x

B)16+3=4x

C)5x+6=7+2x

D)16+4+x=5

E)x=x+2x+4​

Answer 1

15x-2x=20-x

13x+x=20

14x=20

x=20/14 (÷2)

x=10/7

16+3=4x

4x=16+3

4x=19

x=19/4

5x+6=7+2x

3x=1

x=1/3

16+4+x=5

x=5-20

x=-15

x=x+2x+4

x-3x=4

-2x=4 (-1)

2x=-4

x=-4/2

x=-2

Answer 2

Olá...

a)

15x - 2x = 20 - x

13x + x = 20

14x = 20

x = 20/14 ÷ 2

x = 10/7

b)

16 + 3 = 4x

19 = 4x

- 4x = - 19 ( - 1)

4x = 19

x = 19/4

c)

5x + 6 = 7 + 2x

5x - 2x = 7 - 6

3x = 1

x = 1/3

d)

16 + 4 + x = 5

20 + x = 5

x = 5 - 20

x = - 15

e)

x = x + 2x + 4

x = 3x + 4

x - 3x = 4

- 2x = 4 (- 1)

2x = - 4

x = - 4/2

x = - 2

Espero ter ajudado.