-5/6+5*(-2/15)
-5/6+(-2/3)
-5/6+(-4/6)
-9/6
-3/2
-1 1/2
<span>Х+148=600+154
</span>
<span>Х+148 = 754
х = 754 - 148
х = 606
_______________
606 + 148 = 600 + 154
</span>
<span>1000-Х=378-135
1000 - х = 243
х = 1000 - 243
х = 757
_________
1000 - 757 = 378 - 135
</span>