## anonymous one year ago Consider this system of linear equations: y − x = -13 -4x + 3y = -51

1. anonymous

choices (-12,1) (-12,-1) (12,-1)

2. anonymous

3. anonymous

First of all, any ideas about how to get started, or are you completely stuck?

4. anonymous

im completelty stuck on the lesson its self :(

5. anonymous

Okay, no problem!

6. anonymous

ok

7. anonymous

I can think of two possible ways to answer this question. One way would be to try and solve the equations yourself. Alternatively, we could just try each of the multiple choice answers and see which one works.

8. jameshorton

mines say 0,0

9. anonymous

Any preference?

10. anonymous

im thinking that it is -12,1

11. pooja195

Id start with adding x to both sides y − x +x= -13+x y=-13+x The subtitute the y value in place of 3y -4x + 3(-13+x) = -51 <---solve for x

12. anonymous

that looks confusing

13. pooja195

Not at all :) $\huge~\rm~-4x + 3(-13+x) = -51$ Distribute the 3 $\huge~\rm~ 3(-13+x)$

14. anonymous

-39+3x

15. pooja195

Good -39+3x $\huge~\rm~-4x -39+3x = -51$ Combine like terms

16. anonymous

im confused

17. pooja195

See the x's ? Combine them since they are like terms -4+3=?

18. anonymous

-1x

19. pooja195

20. anonymous

-12

21. anonymous

right?

22. pooja195

its just 12

23. anonymous

no bevause 51 is negative.

24. pooja195

a negative divided by a negative is a postivie

25. anonymous

but its not divided its added

26. pooja195