Assume that the numbers are X and Y;
The sum of the two numbers is:
X+Y=-12
Their difference is:
X-Y=84
We can present the number X as a funsction from Y, from any of the equation. Let do that from the first: X=-12-Y
Now, in order to have only one unknown we will write X in this form in the second equation:
(-12-Y)-Y=84
-12-Y-Y=84
-12-2Y=84
-12-84=2Y
-96=2Y
Y=-96/2=-48
X=-12-Y=-12-(-48)=-12+48=36
The scale factor is 1/3 because 9 x 1/3 = 3 and 6 x 1/3 = 2.
Answer:
x = 1
Step-by-step explanation:
Given
- 4y + 5x = 17 and (x - 3) is a solution
Substitute y = - 3 into the equation and solve for x
- 4(- 3) + 5x = 17
12 + 5x = 17 ( subtract 12 from both sides )
5x = 5 ( divide both sides by 5 )
x = 1
Solution is (1, - 3 )
Answer:
ans is here
Step-by-step explanation:
80 - 3.50x ........ (i)
70 - 3x ..............(ii)
Set them equal;
80 - 3.50x = 70 - 3x
Solve for x. 80-70 =3.50x - 3x
10=0.50x
20=x
There will be 20 days out of the 30-day period until the cards will be equal in value.