решите 2 уравнения: (7,3*х)-4,3-(2,8*х)=9,2 и (6,2*у)+2,9-(3,4*у)=8,5.

Question

решите 2 уравнения: (7,3*х)-4,3-(2,8*х)=9,2 и
(6,2*у)+2,9-(3,4*у)=8,5.

Answer 1

(7,3*х)-4,3-(2,8*х)=9,2
7.3*х-4.3-2.8*х=9.2
7.3*х-2.8*х=9.2+4.3
4.5*х=13.5
х=3


(6.2*у)+2.9-(3.4*у)=8.5
6.2*у+2.9-3.4у=8.5
6.2*у-3.4*у=8.5-2.9
2.8*у=5,6
у=2