1. =2.7-1=1.7
2. =-3.6+y+y-2.6=-6.2+2y=2(-3.1+y)
3.=14.5x+2.2c
4. =-6a+12-5a=-11a-12
5. x=-24/-4
x=6
6. 2y+3y=19+4
5y=23
y=23/5=4.6
(900-688):4=212:4=53
369*2:3=738:3=246
328*3:8=9=984:8=123
(90=60)*5*0=0
660-60:6*1=660-10=650
A) 2,45m-21,56=4,41
2,45m=4,41+21,56
2,45m=25,97
m=10.6
б)3,94k=5,91
k= 1,5