2х - 3y + 8 = 0
4x - 2y + 4 = 0
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- 4x + 6y - 16 = 0
4x - 2y + 4 = 0
4y - 12 = 0
y = 3
4x - 6 + 4 = 0
4x = 2
x = 0,5
Ответ ( 0,5 ; 3 )
4:11=12:33 33:11=12:4 4:12=11:33 33:12=11:4
17:5=51:15 15:5=51:17 17:51=5:15 15:51=5:17
A - b + (c - d) = a - b + c - d