Question

a. 3-(2+x) = x +3
b. 3·(2-x) =3- 2x
c. -2·(1+x) = x
d. -3·(3-x) = x
ayudenme en esta

Answer 1

Respuesta:

a.-

3 - (2+x) = x + 3

3 - (2+x)-3 = x + 3 - 3

- 2 - x + 2 = x

(2 + x) : -2 - x

- 2 - x = x

- 2 - x + 2 = x + 2

- x = x + 2

- x - x = x + 2 - x

- 2x = 2

-2x/-2 = -2/-2

x = -1

b.-

3·(2-x) =3- 2x

6 - 3x - 6 = 3 - 2x - 6

- 3x = 2x - 3

- 3x + 2x = 3 + 2x

-x = -3

-x/-1 = -3/-1

x = 3

c.-

-2·(1+x) = x

-2 - 2x + 2 = x + 2

-2x + x = x + 2 - x

-3x = 2

-3x/-3 = 2/-3

x = -2/3

d.-

-3·(3-x) = x

-9 + 3x = x

-9 + 3x + 9 = x + 9

3x = x + 9

3x - x = x + 9 - x

2x = 9

x = 9/2

espero te ayude :)