0
y = x-2
y = -2x+7
Move x and -2x to the other sides of the equations noting that the + and - signs will change in order to keep the equations in balance:
y-x = -2
y+2x = 7
Subtract the bottom equation from the top equation:
-3x = -9
Divide both sides by -3 to find the value of x:
x = 3 and y = 1
Add your answer:
Earn +20 pts
X2 plus 2x plus -6 equals 0?
x2 + 2x -6 = 0 x2 + 2x + 1 = 7 (x + 1)2 = 7 x = -1 ± √7
What is this quadratic equation written in standard form x2 - 10x - 6 equals 2x plus 1?
x2 - 10x - 6 = 2x + 1 Subtracting 2x + 1 from both sides gives: x2 - 12x - 7 = 0
Can you solve x2 plus 2x - 63 equals 0?
x2+2x-63 = 0 When factorised: (x-7)(x+9) = 0 Therefore: x = 7 or x = -9
If x equals 4 then 2x plus 7 equals?
If x=4 then 2x+7 =
What is 2x plus 8 plus x equals 2x plus 15?
X=7
X2 plus 2x plus -6 equals 0?
x2 + 2x -6 = 0 x2 + 2x + 1 = 7 (x + 1)2 = 7 x = -1 ± √7
What is the solution to x2 plus 2x equals 410 the solution is between 7 and 8?
The answer is (3.5)2 plus (4)2 equals 410.
What is the Factor x2 plus 2x 63?
x2+2x-63 = (x-7)(x+9) when factored
What is this quadratic equation written in standard form x2 - 10x - 6 equals 2x plus 1?
x2 - 10x - 6 = 2x + 1 Subtracting 2x + 1 from both sides gives: x2 - 12x - 7 = 0
How do you solve x squared plus 55 -2x equals 90?
x2 - 2x + 55 = 90x2 - 2x - 35 = 0(x+5)(x-7) = 0x = -5, 7
Can you solve x2 plus 2x - 63 equals 0?
x2+2x-63 = 0 When factorised: (x-7)(x+9) = 0 Therefore: x = 7 or x = -9
Find the slope of the line of 2x plus 2y equals 7?
The slope of the line of 2x plus 2y equals 7 is (7/2x - 1).
What is 2x plus 8y plus 7 equals 0?
2x = -7 - 8y
If x equals 4 then 2x plus 7 equals?
If x=4 then 2x+7 =
What is the point of contact of the tangent line of y equals 2x plus k with the curve of y equals x squared -2x -7 showing all aspects of work?
If: y = 2x+k and y = x2-2x-7 Then: x2-2x-7 = 2x+k And so: x2-4x-7-k = 0 Using the discriminant of b2-4ac = 0 gives k a value of -11 Using the quadratic equation formula: x2-4x+4 = 0 gives x a duel value of 2 Therefore point of contact: (2, 0)
8x-7 plus 2x equals 6 plus 5x plus 2?
8x-7 plus 2x equals 6 plus 5x plus 2?
X2 plus 7 equals 36?
if x2 + 7 = 37, then x2 = 29 and x = ±√29
