Rozwiąż równanie metodą podstawiania
3x+4y=2
5x+7y=1
3x+4y=2 /:3
x= 2/3 - 4/3 y
5(2/3 - 4/3 y) +7y=1
10/3 - 20/3y+7y=1
10/3 - 1/3y=1 /*3
10-y=3
y=7
x=2/3- 4/3 *7
x=2/3 -21/3
x=- 19/3 = -6 i 1/3
liczę na naj.;);*
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3x+4y=2 /:3
5x+7y=1
x= 2/3 - 4/3 y
5(2/3 - 4/3 y) +7y=1
x= 2/3 - 4/3 y
10/3 - 20/3y+7y=1
x= 2/3 - 4/3 y
10/3 - 1/3y=1 /*3
x= 2/3 - 4/3 y
10-y=3
x= 2/3 - 4/3 y
y=7
x=2/3- 4/3 *7
y=7
x=2/3 -21/3
y=7
x=- 19/3 = -6 i 1/3
y=7
liczę na naj.;);*