Please help I don't want just the answer I want to know how to solve it.

149 degrees

Step-by-step explanation:

Since m and n are parallel you need to remember the rules of transversals, this means that <1 and <2 are corresponding. Corresponding angles are always congruent, so we can solve for x by setting them equal to each other.

First, move the variables to one side, I will move them both to the right, but remember you can do it on either side. To do this subtract 7x from both sides

, then simplify

Next, add 1 to both sides to isolate the variable

, then simplify

Now that you know what x equals solve for angle 1, to do this plug 4 in for x in the original equation

Finally, you can solve for <3 because <1 and <3 are supplementary. So to solve add both and set them equal to 180, in this equation let x stand for <3. , then subtract 31 from both sides and simplify, . So angle 3 is equal to 149.

51-50

step-by-step explanation: