0

# Y plus x equals 9 10y plus 20x equals 100?

Updated: 10/26/2022

Wiki User

14y ago

y + x = 9

10y + 20x = 100

This is a basic linear system of equalities. We can start by rewriting the first equation as:

-10y - 10x = -90 by multiplying the equation by -10, from here we can eliminate y and solve for x

(-10y - 10x = -90) + (10y + 20x = 100) = (10x = 10)

This yields x = 1, and by plugging x into the first equation y = 8

Wiki User

14y ago

Earn +20 pts
Q: Y plus x equals 9 10y plus 20x equals 100?
Submit
Still have questions?
Related questions

2

### What is the point of intersection of the parabolas y equals x2 plus 20x plus 100 and y equals x2 -20x plus 100 showing work?

If: y = x2+20x+100 and x2-20x+100 Then: x2+20x+100 = x2-20x+100 So: 40x = 0 =&gt; x = 0 When x = 0 then y = 100 Therefore point of intersection: (0, 100)

### What is the point of contact between the curves of y equals x squared plus 20x plus 100 and y equals x squared -20x plus 100?

The graphs of the two equations will intersect when x&sup2; + 20x + 100 = y = x&sup2; - 20x + 100 Subtracting x&sup2; +100 from both sides you get 20x = -20x that will only be true when x = 0. At x = 0, y = 100 for both equations - so the point of contact would be (0,100)

### Where do the parabolas of y equals x squared plus 20x plus 100 and y equals x squared minus 20x plus 100 meet on the x and y axis?

They touch each other at (0, 100) on the x and y axis.

### What number must you add to complete the square of x2 plus 20x equals 39?

x2 + 20x - 39 = 0: Add 61 giving: x2 + 20x + 100 = (x + 10)2

### X2 plus 20x plus 4 equals 0?

x2 + 20x + 4 = 0 x2 + 20x + 100 = 96 (x + 10)2 = 96 x + 10 = &plusmn;961/2 x = -10 &plusmn;961/2 x = -10 &plusmn;4&radic;6

### X2 plus 20x equals 30 solve by completing the square?

x2 + 20x +0 =30 [(20/2)2 =100] x2 + 20x + 100 =30 +100 &radic;(x+10)2=&radic;130 x+10=&radic;130 x= &minus;10+&radic;130 &radic; means square root

### What is the value of x if 2x plus 20x equals 111452?

2x + 20x = 111,45222x = 111,452x = 5,066

### What is the fractorization x²-20x plus 100?

x2-20x+100 = (x-10)(x-10) when factored

### Solve equation 20x plus 27 equals 143?

Improved Answer:-If: 20x+27 = 143Then: x = 5.8

### How do you solve 11x equals 20x Plus 18?

11x = 20x +1811x-20x=18x(11-20)=18-9x=18x=-2

### What is 20x plus 80y equals 0 in y equals mx plus b?

20x + 80y = 0Subtract 20x from each side of the equation:80y = -20xDivide each side by 80:y = -1/4 xm = -1/4b = 0