7.05*12.4-х=28.5
87,42-х=28,5
-х=28,5-87,42
х=58,92
2) х+25,4=5,04*6,05
х+25,4=30,492
х=30,492-25,4
х=5,092
7.05*12.4-х=28.5
87,42-х=28,5
-х=28,5-87,42
х=58,92
2) х+25,4=5,04*6,05
х+25,4=30,492
х=30,492-25,4
х=5,092