Ответ:
......................................
x= 3+y
5(3+y) -3y = 19
15 + 5y -3y =19
2y=4
y=2
x=3+2=5
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Ответ:
......................................
x= 3+y
5(3+y) -3y = 19
15 + 5y -3y =19
2y=4
y=2
x=3+2=5