## sasa01 3 years ago find the value of a and b.

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1. sasa01

|dw:1352972555079:dw|

2. sasa01

|dw:1352972635638:dw|

3. dpaInc

i'm thinking that that 36 is an angle measure and not a length of a side?

4. sasa01

i thought that is that length of a side

5. dpaInc

6. sasa01

none

7. dpaInc

in that case, idk.... :( sorry....

8. sasa01

|dw:1352973186108:dw|

9. sasa01

10. sasa01

|dw:1352973729195:dw|

11. dpaInc

you'll have to solve a system of two equations with two unknowns: 3a + b = 90 7a = b + 90 do you understand where these equations came from?

12. sasa01

how?

13. sasa01

how will i compute these?

14. sasa01

can you show me how to solve this

15. dpaInc

are you asking how i got these equations OR how do you solve this system of equations?

16. sasa01

how to solve

17. dpaInc

just like solving any system of linear equations, you can do elimination or substitution.... these terms ring a bell?

18. dpaInc

maybe if i write the equations this way you'll prolly be able to do elimination: 3a + b = 90 7a - b = 90 add these equations to eliminate the "b" unknown....

19. dpaInc

sorry.... i gotta make like a baby and head out..... gotta go... cya....

20. sasa01

thanks

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