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1) 6 × 2= 12%
2) 12% × 300000= 36000
3)36000 + 300000= 336000
<span> х:18=2:9
x/18 = 2/9
x = 2*18/9 = 36/9 = 4
x = 4</span>
y = kx-2
y = 1
x = -1
1 = k * (-1) -2
kx = k * (-1)
kx = y + 2
kx = 1 + 2 = 3
k = 3 : x
k = 3 : (-1)
k = -3
Проверка
1 = ( -3 ) * ( -1 ) - 2 (минус на минус = плюс)
1 = 3 - 2