Can yall help me me out plz

Which expression is equivalent to 5r6141 2r+st6

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?

What is the solution to the equation below? 3/x-2+6=square root x-2 +8