(1)8(x-2)=2(x+7)
(2)
| 2010 |
| 2011 |
(3)(
| 5 |
| 8 |
| 1 |
| 27 |
| 19 |
| 27 |
(4)
| 3 |
| 5 |
| 1 |
| 7 |
| 8 |
| 21 |
| 2 |
| 3 |
(5)
| 1 |
| 6 |
| 3 |
| 5 |
| 3 |
| 10 |
8x-16=2x+14,
8x-16-2x=2x+14-2x,
6x-16=14,
6x-16+16=14+16,
6x=30,
6x÷6=30÷6,
x=5;
(2)
| 2010 |
| 2011 |
=
| 2010 |
| 2011 |
=
| 2010 |
| 2011 |
| 2010 |
| 2011 |
=2010+
| 2010 |
| 2011 |
=2010
| 2010 |
| 2011 |
(3)(
| 5 |
| 8 |
| 1 |
| 27 |
| 19 |
| 27 |
=
| 5 |
| 8 |
| 1 |
| 27 |
| 19 |
| 27 |
=5+
| 8 |
| 27 |
| 19 |
| 27 |
=5+(
| 8 |
| 27 |
| 19 |
| 27 |
=5+1,
=6;
(4)
| 3 |
| 5 |
| 1 |
| 7 |
| 8 |
| 21 |
| 2 |
| 3 |
=
| 3 |
| 5 |
| 11 |
| 21 |
| 2 |
| 3 |
=
| 3 |
| 5 |
| 25 |
| 21 |
=
| 5 |
| 7 |
(5)
| 1 |
| 6 |
| 3 |
| 5 |
| 3 |
| 10 |
=
| 1 |
| 6 |
| 3 |
| 10 |
=
| 1 |
| 6 |
| 10 |
| 3 |
=
| 5 |
| 9 |