п+4,8=-2*(1,2п+2,4)
x-5*(0,8-1,2)=7,2
-(5x-8)=25-(11x-19)
3/4-1,25=9/8-1/8
1/5(5/9+5)-1/7(7/6x+2 1/3)=2​

LB1621 LB1621    1   29.04.2020 18:37    0