Rozwiązane

x-2y=5
x+y=26



Odpowiedź :

Abbeydown
x-2y=5
2x+2y=52
--------------
x-2y+2x+2y=57
3y=57
y=19

y=19
x-2y=5

y=19
x-38=5

y=19
x=43
x-2y=5
x+y=26

x-2y=5
x = 26-y

26 - y - 2y = 5
26 - 3y = 5
26 - 5 = 3y
y = 21/3
y=7

x - 2y = 5
x - 2*7 = 5
x = 5 + 14
x = 19


y=7, x=19
x-2y=5
x+y=26 --> x=26-y

26-y-2y=5
-3y=-21 /(-3)
y=7

x+7=26 --> x=19

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