1) 5=10/2=15/3=20/4
2) -2=-4/2=-6/3=-8/4
3) -28=-56/2=-280/10=-2800/100
4) 0=0/56=0/496=0/5556214
<span><span>55х - 155 - 9х = 121
46 х = 121 + 155
46 х = 276
х = 276 : 46
х = 6
Проверка:
55 *6 - 155 - 9* 6 = 121</span><span>
</span></span>
912/4
8 /203
12
12
0 равно 203
3(5-х)+2(4х-3)=4
15-3х+8х-6=4
-3х+8х=4-15+6
5х=-5
х=-1.
3(5х-4)-4(х+2)=2
15х-12-4х-8=2
15х-4х=2+12+8
11х=22
х=2.