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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.
What else can I help you with?
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 you mean, "x-3y = 12", then xy = 3y2 + 12y.
Collect like terms 3xy plus xy-4x plus x?
-1
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)
X square plus 4x plus xy plus 4y?
In order to combine terms, the variable(s) must be the same and the exponent(s) must be the same on the variables. Since you have an x2 term, x term, xy term and y term, none of the terms can be combined. So, the answer is: x2 + 4x + xy + 4y. The only thing you could do in this problem is to factor out a 4 from the 4x & 4y so another way to write this is: x2 + xy + 4(x + y).
