<u>1% - это сотая часть</u>
2% = 2/100 = 1/50
5% = 5/100 = 1/20
20% = 20/100 = 1/5
60% = 60/100 = 3/5
80% = 80/100 = 4/5
140% = 140/100 = 7/5
180% = 180/100 = 9/5
НОК(125,210)=(5*5*5)*2*3*7=5250
125/5 210/2
25/5 105/5
5/5 21/3
1/ 7/7
1/
9х-36=2,07
9х=36+2,07=38,07
х=38,07:9=4,23
(3y-7,4)*3=4,8
3y-7,4=4,8:3
3y-7,4=1,6
3y=7,4+1,6
3y=9
y=9:3
y=3
Периметр квадрата = а+а+а+а=4*а=20:4=5