Answer:
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Answer:
7x-17y
Step-by-step explanation:
We need to find the expression which represents the difference when (-2x+10y) is subtracted from (5x−7y) . Let the result is R.
So,
R = (5x−7y)-(-2x+10y)
Solving brackets as follows :
R = (5x−7y)+2x-10y
taking like terms together
R = (5x+2x)+(-7y-10y)
R = 7x-17y
Hence, when (-2x+10y) is subtracted from (5x−7y) the result is (7x-17y).
Answer:
Step-by-step explanation:
Given that:
is a supplement of 
.
m = 78°
To find:
m = ?
Solution:
First of all, let us learn about the concept of an angle being a supplement of the other angle.
is known as supplement of 
, if sum of the two angles is equal to 180°.
.
For example, angle made on one side by a line intersecting the other line are supplement of each other.
Here, we are given that is a supplement of .
In other words:
Putting value of :
So, the answer is:
Answer:
the letter "x" is often used in algebra to mean a value that is not known yet. It is called a 'varaible' or sometimes unknown.
