Odpowiedzi

2010-01-06T14:54:43+01:00
2x+y=180
x=y-15
2(y-15)+y=180
2y-30+y=210
3y=210/y
y=70st
x=y-15
x=70-15
x=55
y=70
joł
2010-01-06T14:56:53+01:00
2x+y=180
x=y-15

x=y-15
2(y-15)+y=180

x=y-15
2y-30+y=180

x=y-15
3y=180+30

x=y-15
3y=210 /÷3

x=y-15
y=70

x=70-15
y=70

x=55
y=70

Sprawdzenie:
2×55+70=180
180=180