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|dw:1380240656292:dw|

Do you need to find "x"?

yeah

|dw:1380240805073:dw|

Yes, no, maybe?

yes its 90

Good! Do you know how many degree there is in a straight angle?

180

Good job! Now you can set up an equation. |dw:1380240985189:dw| Does the equation make sense?

kinda

Alright, I'll explain it in detail at the end. Anyway, combine like terms.
90 + (-10) = ?
4x + x = ?

so 90+-10=80
5x

Good! |dw:1380241194913:dw| Do you know what to do next?

subtract 80 from 180 which would be 5x=100
x=20

Good job. So x = 20. I hoep this help!

hope*

thanks

|dw:1380241460361:dw|

Yeah, no problem. :)