Explications étape par étape:

x = 1

multiplier

x X 2 - ( x + 1)= 0

x X 2 - x - 1 = 0

combiner

x - 1 = 0

x = 1

x = - 1/2 = - 0,5

x - 1 + x + 3 = 0

combiner

2x - 1 + 2 = 0

additionner

2x + 1 = 0

soustraire

2x = - 1

diviser

x = - 1/2

C x = - 2/3

x - 4 = ( 2x - 2) X 2

x - 4 = 4x - 2

soustraire

x - 4 - 4x = - 2

ajouter 4

- 3x = -2 + 4

additionner

- 3x = 2

diviser

x = 2/-3

x = - 2/3

D. x = 1/5

( x - 2 ) X 4 = ( - 3 - 3x ) X 2

distribué

4x - 8 + 6x = - 6

ajouter 8

10x = - 6 + 8

10x = 2

x = 2/10

réduire

x = 1/5