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Which equation can be solved for X in the following diagram.
A) 2x + 30 = 180
B) 2x + 30 = 90
C) 30 - 2x = 90
D) 2x = 30

Question

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Which equation can be solved for X in the following diagram.
 A) 2x + 30 = 180 
 B) 2x + 30 = 90 
 C) 30 - 2x = 90 
 D) 2x = 30

shasha12 · Answer

A?

shasha12 · Answer

@AP  do you have any advice?

AP · Answer

Yes. Tell me first, what is the measurement of a right angle, in degrees?

shasha12 · Answer

ok 90

AP · Answer

Good. Now, that means the total measurement will equal 90, so you can eliminate any options that do not end with = 90

shasha12 · Answer

Ok, so that leaves me B and C

AP · Answer

Yes. What's the difference between the two?

shasha12 · Answer

One is subtraction the other is addition., so I think B

AP · Answer

You got it. You would need to add both to have them sum up to 90°.

shasha12 · Answer

Thank you so much, I understand it better now. :)

AP · Answer

You're welcome. (: 
Tag me if you need any more help.