Ejercicio 1 | ||
x-15
|
=
|
-27 |
x
|
=
|
-27+15 |
x
|
=
|
-12 |
Comprobación
|
-12-15
|
=
|
-27 |
-27
|
=
|
-27 |
Ejercicio 2 | ||
-11x+12
|
=
|
144 |
-11x
|
=
|
144-12 |
-11x
|
=
|
132 |
x
|
=
|
132/-11 |
x
|
=
|
-12 |
Comprobación
|
-11(-12)+12
|
=
|
144 |
132+12
|
=
|
144 |
144
|
=
|
144 |
Ejercicio 3 | ||
-8x-15
|
=
|
-111 |
-8x
|
=
|
-111+15 |
-8x
|
=
|
-96 |
x
|
=
|
-96/-8 |
x
|
=
|
12 |
Comprobación
|
-8(12)-15
|
=
|
-111 |
-96-15
|
=
|
-111 |
-111
|
=
|
-111 |
Ejercicio 4 | ||
6x-10
|
=
|
-16 |
6x
|
=
|
-16+10 |
6x
|
=
|
-6 |
x
|
=
|
-6/6 |
x
|
=
|
-1 |
Comprobación
|
6(-1)-10
|
=
|
-16 |
-6-10
|
=
|
-16 |
-16
|
=
|
-16 |
Ejercicio 5 | ||
-15x-6
|
=
|
9 |
-15x
|
=
|
9+6 |
-15x
|
=
|
15 |
x
|
=
|
15/-15 |
x
|
=
|
-1 |
Comprobación
|
-15(-1)-6
|
=
|
9 |
15-6
|
=
|
9 |
9
|
=
|
9 |
Ejercicio 6 | ||
12x+12
|
=
|
72 |
12x
|
=
|
72-12 |
12x
|
=
|
60 |
x
|
=
|
60/12 |
x
|
=
|
5 |
Comprobación
|
12(5)+12
|
=
|
72 |
60+12
|
=
|
72 |
72
|
=
|
72 |
Ejercicio 7 | ||
-10x+9
|
=
|
-81 |
-10x
|
=
|
-81-9 |
-10x
|
=
|
-90 |
x
|
=
|
-90/-10 |
x
|
=
|
9 |
Comprobación
|
-10(9)+9
|
=
|
-81 |
-90+9
|
=
|
-81 |
-81
|
=
|
-81 |
Ejercicio 8 | ||
5x-15
|
=
|
15 |
5x
|
=
|
15+15 |
5x
|
=
|
30 |
x
|
=
|
30/5 |
x
|
=
|
6 |
Comprobación
|
5(6)-15
|
=
|
15 |
30-15
|
=
|
15 |
15
|
=
|
15 |
Ejercicio 9 | ||
2x-13
|
=
|
-19 |
2x
|
=
|
-19+13 |
2x
|
=
|
-6 |
x
|
=
|
-6/2 |
x
|
=
|
-3 |
Comprobación
|
2(-3)-13
|
=
|
-19 |
-6-13
|
=
|
-19 |
-19
|
=
|
-19 |
Ejercicio 10 | ||
7x+5
|
=
|
-100 |
7x
|
=
|
-100-5 |
7x
|
=
|
-105 |
x
|
=
|
-105/7 |
x
|
=
|
-15 |
Comprobación
|
7(-15)+5
|
=
|
-100 |
-105+5
|
=
|
-100 |
-100
|
=
|
-100 |
Video |
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