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This is a simultaneous equation question:
x-2y = -4
2x-y = 1
Multiply all terms in the top equation by 2:
2x-4y = -8
2x-y = 1
Subtract the bottom equation from the top equation remembering that a minus minus equals a plus:
-3y = -9
Divide both sides of the equation by -3 to find the value of y remembering that a minus divided by a minus equals a plus:
y = 3
Substitute the value of y into the original equations to find the value of x:
Solution: x = 2 and y = 3
What else can I help you with?
How do you solve 8 plus x2y?
i don't get that if it is 2xy +8 or 8 + 2xy then you can't solve or simplify it any further if it were 8 x 2y then you time the 8 by the 2 to get 16y
Solve the equation y' plus x2y equals x2?
(2x)ysquared
Find dyoverdx by implicit differentiation xy2 minus x2y equals 3xy?
Whooop!
What is 4xy plus x3y plus yx2 plus yx plus 3yx simplified?
4xy + x3y + yx2 + yx + 3yx = x3y + x2y + 8xy = (xy)(x2y + x + 8)
How do you factor 3x3-x2y plus 12x-4y?
3x3 - x2y + 12x - 4y = x2*(3x - y) + 4*(3x - y) = (x2 + 4)*(3x - y)
Simplify 8 -x 2y you 2y - x?
8-x2y 8-2xy 2xy-8
How do you solve 8 plus x2y?
i don't get that if it is 2xy +8 or 8 + 2xy then you can't solve or simplify it any further if it were 8 x 2y then you time the 8 by the 2 to get 16y
Solve the equation y' plus x2y equals x2?
(2x)ysquared
Find dyoverdx by implicit differentiation xy2 minus x2y equals 3xy?
Whooop!
What is the greatest common factor of 27x2y3 and 46x2y?
The GCF of 27 x^2 y^3 and 46 x^2 y is xy^2. 27 and 46 are coprime.
What is -2y plus x2y-8?
It is -2y + x2y - 8, which is an expression that cannot be simplified further, not can it be evaluated.
If I know that x2y plus 4 and I plug that into 3y plus 5x what do I get?
You will get nonsense. You cannot plug x2y + 4 into anything!
What is 4x squared y plus 3x squared y?
4 (apples) plus 3 (apples) = 7 (apples). 4 (cows) + 3 (cows) = 7 (cows) 4 (x2y) + 3 (x2y) = 7 (x2y)
Square root of 2xy times 14x3y?
Do the multiplication, then take the square root. After the multiplication, you get 28x4y2. The square root of 28 is 2 times the root of 7, the square root of x4 is x2, and the root of y2 is y. So, the final result is 2 times square root of 7, times x2y.
A number y varies inversely as the square of x If y equals 2 when x equals 6 what is y when x equals 3?
x2y = k (constant) so 36 x 2 ie 72 is the constant. If x = 3 then y = 72/9 = 8
What is the greatest common factor of x2y and xy2?
xy
What is the GCF of x2y and xy2?
The GCF is xy
