X + 9 = 2x - 8
2x - x = 9 + 8
x = 17
BC = x = 17
answer
17 units
The solution of such a system is the ordered pair that is a solution to both equations. To solve a system of linear equationsgraphically we graph both equations in the same coordinate system. The solution to the system will be in the point where the two lines intersect.
Answer:

Step-by-step explanation:
Given

Required
Correctly combine the like terms
We have:

Collect like terms (in decreasing degrees of m)


So:

Answer:
4:15
Step-by-step explanation:
Sum of all quitars: 2+4+9=15
4 black quitars to 15 quitars
4:15
You wanna cross out numbers if they can both divide by the same number. then multiply the numbers in the same row together