Answer:
The horizontal value in a pair of coordinates: how far along the point is. The X Coordinate is always written first in an ordered pair of coordinates (x,y), such as (12,5). In this example, the value "12" is the X Coordinate. Also called "Abscissa"Step-by-step explanation:
Answer:
3x+15= 4x-10
3x-4x= -10-15
-x= -25(minus will be cut on both sides)
so x= 25
Answer:

Step-by-step explanation:
(triangle)
(semicircle)
Add both together

Yes 5,4 is y=x-1 actually anything can be those symbols as long as they add up to the Equation