Ответ:
x+5=16
x=16-5
x=11
100-x=20
x=100-20
x=80
7+x=17
x=17-7
x=10
19-y=13
y=19-13
y=6
y-10=1
y=10+1
y=11
y+40=80
y=80-40
y=40
20+y=90
y=90-20
y=70
x-30=70
x=70+30
x=100
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Ответ:
x+5=16
x=16-5
x=11
100-x=20
x=100-20
x=80
7+x=17
x=17-7
x=10
19-y=13
y=19-13
y=6
y-10=1
y=10+1
y=11
y+40=80
y=80-40
y=40
20+y=90
y=90-20
y=70
x-30=70
x=70+30
x=100