Respuestas
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x + 3 = - 4
x + 3 = - 4x = - 4 - 3
x + 3 = - 4x = - 4 - 3x = - 7
verificamos
- 7 + 3 = - 4
x - 5 = - 11
x - 5 = - 11x = - 11 + 5
x - 5 = - 11x = - 11 + 5x = - 6
verificamos
- 6 - 5 = - 11
- 9 + ( x ) = 5
- 9 + ( x ) = 5- 9 + x = 5
- 9 + ( x ) = 5- 9 + x = 5x = 5 + 9
- 9 + ( x ) = 5- 9 + x = 5x = 5 + 9x = 14
verificamos
- 9 + 14 = 5
4 - ( x ) = 12
4 - ( x ) = 12- x = 12 - 4
4 - ( x ) = 12- x = 12 - 4 - x = 8
4 - ( x ) = 12- x = 12 - 4 - x = 8x = -8
verificamos
4 - (-8) = 12
4 + 8 = 12
12 = 12
x + 7 = - 13
x + 7 = - 13x = - 13 - 7
x + 7 = - 13x = - 13 - 7x = - 20
verificamos
- 20 + 7 = - 13
- ( x ) - 2 = 15
- ( x ) - 2 = 15- x - 2 = 15
- ( x ) - 2 = 15- x - 2 = 15- x = 15 + 2
- ( x ) - 2 = 15- x - 2 = 15- x = 15 + 2- x = 17
- ( x ) - 2 = 15- x - 2 = 15- x = 15 + 2- x = 17x = -17
verificamos
- (-17) - 2 = 15
17 - 2 = 15
15 = 15
- 8 - ( x ) = 17
- 8 - ( x ) = 17- x = 17 + 8
- 8 - ( x ) = 17- x = 17 + 8 - x = 25
- 8 - ( x ) = 17- x = 17 + 8 - x = 25x = -25
verificamos
- 8 - ( - 25 ) = 17
- 8 + 25 = 17
17 = 17
- ( x ) + 6 = 20
- ( x ) + 6 = 20- x = 20 - 6
- ( x ) + 6 = 20- x = 20 - 6- x = 14
- ( x ) + 6 = 20- x = 20 - 6- x = 14x = - 14
verificamos
- ( - 14 ) + 6 = 20
14 + 6 = 20
20 = 20
11 + ( x ) = - 19
11 + ( x ) = - 19x = - 19 - 11
11 + ( x ) = - 19x = - 19 - 11x = - 30
verificamos
11 - 30 = -19
- 19 = - 19