(2x+1-1-2x)/(2x-x<span>×4x^2/2-1)
(2+1-1-2x)/(2x-x</span><span>×4x^2/2-1)
(0+1-1)/(2x-x</span>×4x^2/2-1<span>)
(1-1)/(2x-x</span><span>×4^2/2-1)
0/(2x-x</span><span>×4^2/2-1)=0</span>
72/(8/9)=81км.ч ск 2 мотоц.
72+81=153км.ч скор. двух мото в час
204/153=1ч.20мин.
1) 3x + 9 = 0
3x = - 9
x = -3
2) 7x - 4 = x - 16
7x-x = -16+4
6x = -12
x = -2
3) 6y + 15 = 4y + 17
6y - 4y = 17 - 15
2y = 2
y = 1
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