Determine whether each equation is an identity or whether it has no solution pls & you

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit