Rozwiąż równanie:
x+7=y
x-5=0,5y
x=y-7
(y-7)-5=0.5y
y-12=0.5y
y-0.5y=12
0.5y=12
y=24
x=24-7
x=14
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x=y-7
(y-7)-5=0.5y
y-12=0.5y
y-0.5y=12
0.5y=12
y=24
x=y-7
x=24-7
x=14