Х+2=18
х=18-2
16=16
х*4=32
х=32:4
8=8
х*2=18
х=18:2
9=9
х:8=4
х=8*4
32=32
х:2=8
х=8*2
16=16
х+8=32
х=32-8
24=24
14y - 2y = 100-76; 12y =24; y=2.
Ну вот как то так "фотомач*
1/2 = 18/18 * 1/2 = 18/36,
2/6 = 6/6 * 2/6 = 12/36,
5/9 = 4/4 * 5/9 = 20/36,
1/12 = 3/3 * 1/12 = 3/36,
7/18 = 2/2 * 7/18 = 14/36
1) 0,42:0,06=42/100:6/100=42/100*100/6=7/1*1/1=7*1=7.