1)
315-7x=49
7x=315-49
7x=266
x=38
Проверка:
315-7*38=49
315-266=49.
49=49, верно.
2)
x/6 + 8/6=41-5
x/6 + 8/6=36
x/6=36-8/6
x/6= 34 4/6
x/6=208/6
x=208
Проверка:(208+8):6=41-5
216:6=36
36=36, верно.
(45-x)×7=49 (x+8)÷6=41-5
49÷7=7 41-5=36
x=45-7 36×6=216
x=7 x=216-8
1)
315-7x=49
7x=315-49
7x=266
x=38
Проверка:
315-7*38=49
315-266=49.
49=49, верно.
2)
x/6 + 8/6=41-5
x/6 + 8/6=36
x/6=36-8/6
x/6= 34 4/6
x/6=208/6
x=208
Проверка:(208+8):6=41-5
216:6=36
36=36, верно.
(45-x)×7=49 (x+8)÷6=41-5
49÷7=7 41-5=36
x=45-7 36×6=216
x=7 x=216-8
x=208