SOLUTION: Please help me find the measure of each marked angle: The measures must add to 180. I have the answers: 107 and 73. I'm just not sure how to get it. Not sure what step I'm missing.

Question 679454: Please help me find the measure of each marked angle: The measures must add to 180. I have the answers: 107 and 73. I'm just not sure how to get it. Not sure what step I'm missing.
(10x+7) (7x+3)

The next one has vertical angles and will have the same measure; The answer will be 75 for each, but I"m not sure why I am not getting it.
(3x + 45) (7x + 5)
I really appreciate your assistance.
Joshua
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Please help me find the measure of each marked angle: The measures must add to 180. I have the answers: 107 and 73. I'm just not sure how to get it. Not sure what step I'm missing.
(10x+7) (7x+3)
If they add to 180, then
(10x+7) + (7x+3) = 180
17x + 10 = 180
17x = 170
x = 10
etc.
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The next one has vertical angles and will have the same measure; The answer will be 75 for each, but I"m not sure why I am not getting it.
-------------------
I don't know what a "vertical angle" is. Angles are measured between 2 lines. Vertical is a direction.
(3x + 45) (7x + 5)

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