Rozwiąż układ równań metodą podstawiania 2x+3y=5 -2x+5y=7
2x+3y=5
-2x+5y=7
2x=5-3y
-2*(5-3y)+5y=7
-10+6y+5y=7
11y=7+10
11y=17/:11
y=1 6/11
2x=5-3*1 6/11
2x=5-4 7/11
2x=(1 7/11)/:2
x=9/11
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2x+3y=5
-2x+5y=7
2x=5-3y
-2*(5-3y)+5y=7
2x=5-3y
-10+6y+5y=7
2x=5-3y
11y=7+10
2x=5-3y
11y=17/:11
2x=5-3y
y=1 6/11
2x=5-3*1 6/11
y=1 6/11
2x=5-4 7/11
y=1 6/11
2x=(1 7/11)/:2
y=1 6/11
x=9/11
y=1 6/11