Răspuns :
9x+28=2755
9x=2727
x=3
510+14x=762
14x=252
x=18
5y-97=943
5y=1040
y=208
410-7y=151
7y=259
y=37
9x=2727
x=3
510+14x=762
14x=252
x=18
5y-97=943
5y=1040
y=208
410-7y=151
7y=259
y=37