{2a+2b=25
{a-3,5=b
2a + 2b = 25
a - 3,5 = b
2a + 2b =25
a - b = 3,5 /* (-2)
2a + 2b= 25
-2a + 2b = -7
2a + 2b - 2a + 2b= 25 - 7
4b = 18 /: 4
b= 4,5
2a + 2*4,5 = 25
2a = 25 - 9
2a = 16 /:2
a= 8
Pozdrawiam, Damiankw:)
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2a + 2b = 25
a - 3,5 = b
2a + 2b =25
a - b = 3,5 /* (-2)
2a + 2b= 25
-2a + 2b = -7
2a + 2b - 2a + 2b= 25 - 7
4b = 18 /: 4
b= 4,5
2a + 2b= 25
2a + 2*4,5 = 25
2a = 25 - 9
2a = 16 /:2
a= 8
Pozdrawiam, Damiankw:)