90°-58°=32° - ∠АВС
JK=1,7см
1,08:2=0,54см - LM
19,5-12,8=6,7см - АВ
9+8=17дм - PM
25-3x=9-5x
-3x + 5x = 9-25
2x = 16
x = 16:2
x= 8
x: 6/7 = 1 1/6: 3 1/2
x; 6/7 = 7/6 : 7/2
x: 6/7 = 1/3
x = 1/3 × 6/7
x= 2/7
X=8/11y; x+y=47,5 - система
8/11y+y=47,5;
19/11y=47,5;
y=47,5/19*11;
y=27,5;
x=47,5-27,5=20;
1.950
2.1800
3.768
4.720
5.11740
6.16560