Triangle ABC is congruent to triangle XYZ. Angel A measures 50 degrees. Angle B measures (2x+40) and angle Y (4x+8). Find the value of x. How do I set this up proportionally?

Proportionally? Not sure. But here is a way to find out the value of x

50° + 2x+40 + 4x+8 = 180°

Combine like terms

50° + 6x + 48=180

(now subtract 50° from both sides)

6x + 48 = 130°

(now subtract 48 from both sides

6x=82°

x = 13.6666667° (repeating decimal)