<span>Решим уравнение:
а) 8у=-62,4+5у
8у-5у=-62,4
3у=-62,4
у=(-62,4):3
у=-20,8-------------------
Проверка: <span>
8*(-20,8)=-62,4+5*(-20,8)
</span><span>-166,4 = -62,4-104
</span><span>-166,4=-166,4
</span>
б)
х -
х +1=
х + <span>
</span>
х -
х -
х = <span>
- 1
</span>
х -
х -
х=
- <span>
</span><span>-
</span>х= - <span>
</span>
х= <span>
</span>х=
: <span>
</span>х=
х=2
-----------------------------
Проверка:
<span>
*2-
*2+1=
*2+<span>
</span></span>1
-
=1+<span>
</span>
-
=1 <span>
</span>
-
= <span>
</span>
=<span><span>
</span></span>
</span><span>в) 2,6х-0,75=0,9х-35,6
2,6х-0,9х=-35,6+0,75
1,7х=-34,85
х=(-34,85):1,7
х= -20,5
----------------------
Проверка:<span>
2,6*(-20,5)-0,75=0,9*(-20,5)-35,6
</span><span>-53,3-0,75=-18,45-35,6
</span><span>-54,05-=-54,05
</span>
г) 6
: 1
=4,5 : у
:
=4,5:у
<span>
=4,5:у
</span>
=
:у
у=
:
у=<span>
</span><span>
у=1,3</span>-----------------
</span><span> 6
: 1
=4,5 : 1,3
</span>
=<span>
:
</span>
<span>
=
</span>
=<span><span>
</span></span>