40+20=60*2=120-70=50:5=10
100*8=800-300=500+320=820:2=410
80:4=40*6=240+80=320+800=1120
X-512 = 302
x= 302 + 512
x=814
302
+
512
-----------------
814
Проверка:
814-512
814
-
512
--------
302
7 + 2 6 + 4 8 + 3 6 + 3 9 + 2 2 + 6 = 9 + 10 11 + 9 11 + 8 = 19 + 20 11 + 8 = 39 + 19 = 58
6х -38 =62
6х= 62+38
6х= 100
х=100:6
х= 16 4/6= 16 2/3
62=62