We can solve the equation system using elimination and subtitution method.
First, eliminate x to find the value of y
x - 2y = 9
x - y = 11
---------------- - (substract)
-y = -2
y = 2
The value of y is 2
Second, subtitute 2 as y in one of the equation
x - y = 11
x - 2 = 11
x = 11 + 2
x = 13
The solution
x, y = 13, 2
Simple...if you want to solve this.....
49-7x=21
Isolate the variable (x)
49-7x=21
-49 -49
-7x=-28
Now, simplify...
x=4
Thus, your answer.
Answer:
Each girl gets 2/3 yd of ribbon.
Step-by-step explanation:
12 2/3=38/3
(38/3)/19
(38/3)(1/19)
(2/3)(1/1)=2/3
<, > - open circle
≤, ≥ - closed circle
<, ≤ - draw to the left
>, ≥ - draw to the right
--------------------------------------------
We have x ≥ 3
closed circle on number 3 and draw the line to the right