-2
x+xy=8 xy=-x+8 y=-1+8/x
2+2y+x+xy=(x+2)(y+1)
xy + x + y + 1 is an expression, not an equation. An expression cannot be solved.
So far you know that: x=-8 xy=1 so xy means x times y. If you split xy. y=1/x or y=1/-8 1/-8= -0.125 You can find out that this is correct with the formula xy=1 because -0.125 x -8 is 1.
If Y = 0 then there is no value of X such that XY = 1.
x+xy=8 xy=-x+8 y=-1+8/x
It equals y+1
xy = x ÷x y = 1
xy + x + y + 1 = (x + 1)(y + 1).
xy + y = z xy = z - y (xy)/y = (z - y)/y x = (z - y)/y
(x-y) + (xy - 1) = (x - 1)(y + 1)
2+2y+x+xy=(x+2)(y+1)
xy + x + y + 1 is an expression, not an equation. An expression cannot be solved.
So far you know that: x=-8 xy=1 so xy means x times y. If you split xy. y=1/x or y=1/-8 1/-8= -0.125 You can find out that this is correct with the formula xy=1 because -0.125 x -8 is 1.
4
y=(x+2)/(x+10) xy+10y=x+2 xy-x=2-10y x(y-1)=2-10y x=(2-10y)/(y-1)
If Y = 0 then there is no value of X such that XY = 1.