a - jedna liczba
b - druga liczba
a-b=5
2a-b=30
a=5+b
2(5+b)-b=30
10+2b-b=30
b=30-10
b=20
a-20=5
a=5+20
a=25
spr.
2*25-20=50-20=30
x - y = 5
2x - y = 30 x = 5 + y 2 ( 5 + y ) - y = 30 10 + 2y - y = 30 10 + y = 30 y = 30 - 10 y = 20 x = 5 + 20 x = 25
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a - jedna liczba
b - druga liczba
a-b=5
2a-b=30
a=5+b
2(5+b)-b=30
10+2b-b=30
b=30-10
b=20
a-20=5
a=5+20
a=25
spr.
2*25-20=50-20=30
x - y = 5
2x - y = 30
x = 5 + y
2 ( 5 + y ) - y = 30
10 + 2y - y = 30
10 + y = 30
y = 30 - 10 y = 20
x = 5 + 20
x = 25