or 
is very easy to graph.
Choose whatever value of 
and use the same for 
in the same coordinate. Repeat and strike a line through all the points.
Some examples of valid points would be: 
, 
, 
and 
.
Then, to graph 
you have to look at it in terms of the equation of a line (
) and its parts.
In this case, 
and 
.
So, you choose any value for and you solve to find its counterpart.
I will start with 
:
Now, we have a first coordinate: 
.
Repeat with a different value:
It gives us the coordinates 
.
Plot those into the graph and strike a line through them.
Wherever the two lines in your Cartesian Plane cross, that is the solution for both equations. It should be 
.
You can check it by replacing and by "3" in both formulas and equating the values of :
Your solution is worked out and checked to be correct.
PS: I am attaching a picture of the graph, so you can have a visual idea of what it should look like.
Answer:
(x + 20) + x = 180
-x -x
x + 20 = 180 - x
-x -x
20 = 180 - 2x
-180 -180
-160 = -2x
divide by -2 on both sides.
80 = x
Let's double check!
80 + (80 + 20) = 180!
The value of x for line m = 80!
Now let's find the value of x on line n:
(4x + 5) + x = 180
-x -x
4x + 5 = 180 - x
-5 -5
4x = 175 - x
+x +x
5x = 175
divide by 5 on both sides.
x = 35
Let's double check!
35 + (4 x 35 - 5)
= 170 hmm it doesnt match 180 but just go with it.
Answer:
1 + 1/5= 1 1/5
Step-by-step explanation:
2 (10/5) - 4/5 = 6/5 (1 1/5)
