metodą podstawiania
3-2y=4
x-5y=7
3-2y = 4
x-5y = 7
2y=4-3
2y=1
y=0,5
x-5*0,5 = 7
x-2,5 = 7
x=9,5
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3-2y = 4
x-5y = 7
2y=4-3
x-5y=7
2y=1
x-5y=7
y=0,5
x-5*0,5 = 7
y=0,5
x-2,5 = 7
y=0,5
x=9,5