Реши уравнения 30 (х+240)*3=1260 х+(240*3)=1260 х+240=1260*3 с: 8*25=1000 510-9*у=438

30x+720=1260
30x=540
x=17

x+720=1260
x=540

x+240=3780
x=3540

c:200=1000
c=200000

-9y=-510+438
-9y=-72
y=8

(х+240)*3=1260
3х+720=1260
3х=540
х=540/3
х=180

х+(240*3)=1260
х+720=1260
х=1260-720
х=540

х+240=1260*3
х=3780240
х=3540

С:8*25=1000
С/200=1000
С=1000*200
С=200000

510-9*у=438
-9у=438-510
-9у=-72
у=8