Уравнения:
6.7*(7.9-у)=28.81
(x-3.25)*3.6=1.62
2.3у+31+2.5у=67

6,7×(7,9-y)=28,81 (x-3,25)×3,6=1,627,9-y=28,81÷6,7 x-3,25=1,62÷3,67,9-y=4,3. x-3,25=0,45y=7,9-4,3. x=3,25+0,45y=3,6 x=3,7____________ _____________ 7,9-3,6=4,3 3,7-3,25=0,45 4,3=4,3. 0,45= 0,45