Question

a. 3 − (2+x) =x+3
b.
c. 2[3(x−1) −2(1−x)] =20
d. √8 − 7 – 2 = 3

Answer 1

Explicación paso a paso:

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

3 - 2 - x = x + 3

1 - x = x + 3

- x - x = 3 - 1

- 2x = 2

x - 1

c. 2 [ 3 ( x - 1 ) - 2 ( 1 - x ) ] = 20

2 [ 3x - 3 - 2 + 2x ] = 20

2 [ 5x - 5 ] = 20

10x - 10 = 20

10x = 20 + 10

10x = 30

x = 3