A){a+b=42 {2a+18b=420
b){a-b=43
{125a+8b= -100
c){5(x+y)=40
{21x-8y= -35
d){25p-49=R
{12p+68=R
e){x+y=2
{5x+80y=130
f) {5s-7t=18,9
{s+4t= -8,1

kiradark15    1   26.11.2020 12:31    8