x*0,4=1/3 (33-x)
0,4x=11-1/3x
4/10x+1/3=11
22/30x=11
x=15
8-3 = 5, 5+4 = 9
9-3 = 6, 6+4 = 10
13-3 = 10, 10+4 = 14
10-3 = 7, 7+4 = 11
?-3 = 9 => ? = 9+3 = 12
12-3 =9, 9+4 = 13
Смотри прикрепленный рисунок
144: (х+5)=9
9*(х+5)=144
9х+45=144
144-45=9х
99=9х
х=99/9
х=11
80000+7000+200+10+1=87211
900000+0+0+100+0+5=900105
100а+70+n
1000х+100у+10z+а