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1. 4x + 3y = -2
2. x - y = -4
Multiplying 2. by 3 gives: (we have done this so that we end up with a -3y)
3. 3x - 3y = -12
1. added to 3. gives: (now, by adding, the 3y & -3y will cancel out)
4. 7x = -14 (the 4x + the 3x gives 7x, the y's cancel out, -2 + -12 gives -14)
thus x = -14/7
x = -2
Substituting x = -2 into 1. gives
(4 * -2) + 3y = -2
-8 + 3y = -2
3y = -2 + 8
3y = 6
y = 2
Thus x = -2 and y = 2.
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4xy plus 1 equals 3y-7x solve for y?
4xy+1=3y-7x 4xy-3y=-7x-1 y(4x-3)=-7x-1 y=(-7x-1)/(4x-3)
What is the complete factor of 6x3y plus 5x2y2-6xy3?
xy(3x - 2y)(2x + 3y)
If xz plus zy equals xy and xz equals zy then the point z is?
mid point of xy
How do you factor yz plus xy plus 4x plus 4z?
y(z+x) + 4(x+z)
What is inverse function for fx equals x divided by x minus 3?
y = x/(x - 3) so y(x - 3) = x xy - 3y = x xy - x = 3y x(y - 1) = 3y x = 3y/(y - 1) for y ≠1 So, the inverse function is f(y) = 3y/(y - 1) where y ≠1
4xy plus 1 equals 3y-7x solve for y?
4xy+1=3y-7x 4xy-3y=-7x-1 y(4x-3)=-7x-1 y=(-7x-1)/(4x-3)
What is the substiution eqaution for x plus y equals 15 and 4x plus 3y equals 38?
x + y = 154x + 3y = 38from the first equation, y = 15-xsubstitute this value in the second equation as follows:4x + 3(15-x)= 384x + 45 - 3x = 38x + 45 = 38x = 38 - 45so, x = -7substitute this value to solve for y:y = 15 -xy = 15-(-7)y = 22
What is the answer to this math question 3xy-xy-2y plus 5y?
That equals 2xy + 3y which factors to y(2x + 3)
How do you write 3y-12x equals 0 in function form?
3Y - 12X = 0add 12X to both sides3Y = 12Xdivide both sides integers by 3(3/3)Y = (12/3)XY = 4X---------------the function
How do you factor x squared plus xy?
Divide by 'x'; x2+xy/x = x(x+y)
How do you solve 4x-y2 and 3x y5?
4x-y2=2xy 2x ? y5 if its plus its 7 xy
If x-3yy12then xy equal to?
If x - 3y = 12, we can solve for x in terms of y: x = 12 + 3y. Then, to find xy, we multiply x by y: xy = y(12+3y) = 12y + 3y^2.
What is the complete factor of 6x3y plus 5x2y2-6xy3?
xy(3x - 2y)(2x + 3y)
Collect like terms 3xy plus xy-4x plus x?
-1
If xz plus zy equals xy and xz equals zy then the point z is?
mid point of xy
How do you factor yz plus xy plus 4x plus 4z?
y(z+x) + 4(x+z)
3x plus 2y multiplied by 5x-3y equals?
(3x+2y)*(5x-3y) =3x*5x + 3x*(-3y) + 2y*5x + 2y*(-3y) [This is sometimes called the FOIL method - You multiply the First members of each bracket, then the Outers, Inners, Lasts] = 15x2 - 9xy + 10xy - 6y2 = 15x2 + xy - 6y2
