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0,2x=0,8y
x=150+y
0,2(150+y)=0,8y
30=0,6y
y=50
0,2x=0,8*50
0,2x=40
x=200
y- druga liczba
dwa równania:
x-y=150 \+y
20%x=0,8y 20%x=⅕x=
x=150+y
⅕x=0,8y
x=150+y
⅕(150+y)=0,8y
x=150+y
30+⅕y=0,8y \×10
x=150+y
300+2y=8y \-2y
x=150+y
300=6y \÷6
x=150+y
50=y
x=150+50=200
ODP: szukane liczby to 200 i 50
20%x=0,8y
x-y=150
0,2x=0,8y
x-y=150
x=4y
4y-y=150
x=4y
3y=150
x=4y
y=50
x=200
Pozdrawiam! :)