## anisah.21a one year ago 5 x − 7 y = −8 −7 x + 2 y = −20 How to solve for x and y with substitution method

1. precal

5x-7y=-8 isolate x 5x=7y-8

2. anisah.21a

then?

3. anisah.21a

it gives you x=7/5y-8/5

4. precal

$x=\frac{ 7y-8 }{ 5 }$

5. precal

yes that is correct

6. anisah.21a

so that is x?

7. precal

now sub in the other equation

8. precal

yes, it is

9. anisah.21a

10. anisah.21a

it doesn't give me a long enough response for the x value when i try to submit the answer . ive tried it many times

11. precal

ok are you using math lab?

12. precal

x=(7/5)y-(8/5)

13. precal

try that one

14. precal

are you looking for the solution

15. anisah.21a

yes

16. anisah.21a

not a long response but one number

17. precal

x=4 y=4

18. anisah.21a

how did you get that?

19. precal

There are many ways to do this problem

20. precal

I used my calculator

21. anisah.21a

may i ask, what you did on the calculator?

22. anisah.21a

i'll rate you best response if you explain yourself and not just tell me the answer, thank you.

23. precal

I did explain it. I have to go now