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3x - 2x = 3 + 17
x = 20----Respuesta
x - 7 = 2 (x - 3)
x - 7 = 2x - 6
x - 2x = - 6 + 7
- x = 1
x = - 1-------Respuesta
12 - (x + 3) = 6
12 - x - 3 = 6
- x + 9 = 6
- x = 6 - 9
- x = - 3
x = 3------------Respuesta
1 - x = 1 + x
- x - x = 1 - 1
- 2x = 0
x = 0/-2
x = 0--------Respuesta
-3(x + 1) = 2x + 3
- 3x - 3 = 2x + 3
- 3x - 2x = 3 + 3
- 5x = 6
x = 6/-5
x = - 6/5-------Respuesta
3x - 2x =3+17
(3-2)x = 20
x = 20
⇒ x - 7 = 2 ( x - 3 )
x - 7 = 2x - 6
x - 2x = 7 - 6
-x = 1
x = 1 / -1
x = -1
⇒ 12 - ( x + 3 ) = 6
12 - x - 3 = 6
12 - 3 - 6 = x
3 = x ó x = 3
⇒ 1 - x = 1 + x
1 - 1 = x + x
2x = 0; Por lo tanto
x = 0
⇒ -3(x + 1) = 2x + 3
-3x - 3 = 2x +3
-3x - 2x = 3 + 3
-5x = 6
x = ( 6 / -5 )
x = - ( 6/5 )
Espero y te sirva ;)