finding the measure of vertical angles

[maryschweich]

i cant get this there like vertical angles and the problem is 3x+15 and the on right across says 4x and i cant find x can someone please help
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[tkhunny]

Wow. I'm afraid you'll have to provide substantially better information than that.

 

[skeeter]

i cant get this there like vertical angles and the problem is 3x+15 and the on right across says 4x and i cant find x can someone please help
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I gather that you are given a pair of vertical angles ...
one of the pair has measure 3x+15, the other has measure 4x

since vertical angles are congruent ...

4x = 3x + 15

now, do the algebra and solve for x ... then substitute what you get for x back into either expression to find the measure of both angles.

 

[maryschweich]

thank you skeeter that was really helpful!!

 

[tkhunny]

That really hurts.

Good call, skeeter. I still don't understand it.