1.
(х-7.4)+2.8=9.1
х-7.4+2.8=9.1
х-4.6=9. 1
х=9. 1+4.6
х=13. 7
Проверка:
(13.7-7.4) +2.8=9. 1
9.1. =9.1
2.
(y+3.716)-1.23=6.4
y+3.716-1.23=6.4
у+2.486=6.4
у=6.4-2.486
у=3.914
(3.914+3.716)-1.23=6.4
6.4=6.4
1.
(х-7.4)+2.8=9.1
х-7.4+2.8=9.1
х-4.6=9. 1
х=9. 1+4.6
х=13. 7
Проверка:
(13.7-7.4) +2.8=9. 1
9.1. =9.1
2.
(y+3.716)-1.23=6.4
y+3.716-1.23=6.4
у+2.486=6.4
у=6.4-2.486
у=3.914
Проверка:
(3.914+3.716)-1.23=6.4
6.4=6.4