-6
x+y=-7
x-y=1
2x=-6
x=-3
(-3)+y=-7
y=-4
It equals y+1
Just plug in the values for x and y. 4(-1) - 2(5) + (-1)(5) = -19
4
0
y=f(x)= x(2x+y)=7 f(x)=2x^2 +xy -7 = 0 y=2x^2 +xy -7 y-xy -7 + 2x^2 = 0 y(1-x)=2x^2-7 y=(2x^2-7) / (1-x) Excuse the working. Y equals 2 X squared minus 7 all divided by 1-X
It equals y+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
Just plug in the values for x and y. 4(-1) - 2(5) + (-1)(5) = -19
"xy" refers to the product of "x" and "y". Just substitute the variables for numbers, and do the multiplication.
xy + x + y + 1 = (x + 1)(y + 1).
That is the commutative property of equality.
xy = x ÷x y = 1
xy + x + y + 1 is an expression, not an equation. An expression cannot be solved.
It equals 1 + 3z and, unless you know the value of z, you are not going to be any the wiser as to its value.
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.
That depends what the value of p is.