# Thread: Solve the system of equations below by graphing them with a pencil and paper.

1. Solve the system of equations below by graphing them with a pencil and paper. Choose the correct ordered pair (b, u).

u = -b + 21
u = -2b + 30

2. Graph the two lines. The answer is the point where they intersect.

3. i got it how about this 1 Solve the system of equations below by graphing them with a pencil and paper. Enter your answer as an ordered pair.

y = -x + 2
y = -2x + 6

4. Exactly the same way you did the first one.

Make sure you have a ruler, pencil, eraser and steady hands.

5. wat do i graph

6. Originally Posted by daniel323
wat do i graph
Each of these

$\displaystyle y =-x+2$
$\displaystyle y=-2x+6$

are straight lines, graph them both then following advice given in post #2.

7. cant do it

8. What have you tried?

9. wat am i suppose to graph the 6 and 2 or the x

10. Originally Posted by daniel323
wat am i suppose to graph the 6 and 2 or the x
I showed you how to do this in a previous thread.

I also showed you how to solve a system.

Go try to figure out what is going on there, and come back with any serious questions.

11. the other problem the numbers are the same so it diffrent

12. Originally Posted by daniel323
the other problem the numbers are the same so it diffrent
HINT: Multiply the first equation through by -2.

13. so is the answer 1,3

14. Originally Posted by daniel323
How did you get that?

y = -x + 2
y = -2x + 6

Following the hint we multiply the first equation through by -2 to get:

-2y = 2x - 4
y = -2x + 6

Now what do you want to do?

15. how did u get 4 in there

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