# Algebra

posted by William

Which point is a solution of the system?

Y=x-9
X+2y=3

1. DrBob222

Substitute x-9 from the first equation into the second equation for y to obtain
x+2(x-9)=3
x+2x-18=3
3x=21
x=7
Now substitute x=7 into the first equation to evaluate y and you will have the point.
Post your work if you want us to check it.

2. Chris

I still don't completely understand how you got x=7 forgive me for being slow, just never liked math.

3. Chris

OH i get it, ah alright. Now to get y=x-9 i just plug in x=7 right? and would leave me with y= -2 right? and it would look like this

y=7-9 and y=-2

4. DrBob222

right.
So the point is x=7 and y=-2 or (7,-2).

## Similar Questions

1. ### algebra

for the system of inequalities y >= 2x - 1 and y <= 3x - 1, which of the following statements best descibes the ordered pair (1,1) a)The point (1,1) is a solution for y >= 2x - 1, but not y <= 3x - 1. b) The point (1,1) …
2. ### algebra

for the system of inequalities y >= 2x - 1 and y <= 3x - 1, which of the following statements best descibes the ordered pair (1,1) a)The point (1,1) is a solution for y >= 2x - 1, but not y <= 3x - 1. b) The point (1,1) …
3. ### College Algebra

The point (6, 2) lies on the line -x – 8y = -22. Determine if this point is a solution of the system -x – 8y = -22 -7x + 3y = -36
4. ### algebra 2

Identify the point of intersection listed below each system of linear equations that is the solution of that system. 2x+5y=10 x-3y=-6 (5,0);(0,2); (3,1)
5. ### algebra

solve system graphically. be sure to check your solution. if a system has infinite number of solutions, use set builder notation to write the solution det. if a system as no solution, state this. a=1+b b=5-2a
6. ### Algebra

The point (6,2) lies on the line -x-8y=-22. Determine if this point is a solution of the system. -x-8y=-22,-7x+3y=-36
7. ### Intermediate Algebra

Solve the following system of equations. x+4y=5 x=6-4y What is the solution of the system?
8. ### algebra

Which of the following ordered pairs is included in the solution set of the system, y < 2 - 2x and y > 2x -3?
9. ### Algebra 1

Solve each system graphically. Be sure to check your solution. If a system has an infinite number of solutions, use set-builder notation to write the solution set.If a system has no solution, state this. I tried this and found no solution, …
10. ### Algebra Help

1. Verify that (-4, 12) is the solution to the system. Show work to justify your answer 2x+y=5 -5x-2y=-6 2. Solve the system by graphing. State the solution. x + y =2 2y – x = 10 3. Solve the system by substitution. State whether …

More Similar Questions