We can solve this by substitution. Let's make the second equation equal y by adding y to both sides. The equation would look like:
x-5=y
Let's plug that equation in for y in the first equation.
2x+x-5-10=0
Let's add like terms.
2x+x-15=0
Let's add 15 to both sides.
2x+x=15
3x=15
Now divide.
15÷3=5=x
Now, x equals 5, so that means y equals 0. Let's check in both equations.
2(5)+0-10=0
10+0-10=0
0=0
5-0-5=0
0=0
So, the solution of the system shown is (5,0). I also included a graph so you could see where they intercept. The solution, when put in the graph, is the x intercept.

6 0

3 years ago

On a standardized test, Rall answered the first 22 questions in 5 minutes. There are 77 questions on the test. If he continues t

Rasek [7]

Data:
Questions = 77
Anwered = 22
<span>Missing = 77 - 22 = 55
</span>
Solving:

Questions ________ Time
22 -------------------------- 5
55 -------------------------- t

<span>Multiply cross:
</span>
$22*t = 55*5$
$22t = 275$
$t = \frac{275}{22}$
$\boxed{t = 12,5minutes}$

3 0

3 years ago