You would add like terms so it would be 1x then you add 1 to 7 so you would get 8.. the you divide both sides by 1x and you'd get 8=x
Could you attach photo of a problem. It appears 2+..... =4 is missing
Probably A I am not really sure I am trying sorry if it is wrong
Notice the picture,
recall your SOH, CAH, TOA

you have,
opposite side, 165
adjacent side, 50
and the angle
that means, we'll need Mrs. tangent
thus