Question 824226

This is my question. 
A, b, c are angles around a point. (I already know that angles around a point is 360). Angle b is 15 degrees more than angle a. Angle c is 95 degrees. By constructing an equation and solving it, find angle a and b. 
This is what I have tried before asking. 
A+b+c=360
A+b+95=360
A+b=360-95
A+b=265
15+b=265
B=265-15
B=240
This is where I get stuck because even with this answer(so if a and b equal this) 240+95 does not equal 360 but equals 335. Can you tell me where I went wrong please. Thanks.

<pre>
You're correct up to: a + b = 265 ----- eq (i)
After that, it should be: b = a + 15
a + a + 15 = 265 ------- Substituting a + 15 for b in eq (i)
2a = 265 - 15
2a = 250
a = {{{250/2}}}, or {{{highlight_green(125^o)}}}
b = 265 - 125, or {{{highlight_green(140^o)}}}
You can do the check!! 

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