Find the measure of each angle in triangle abc. a=50-x b=9x-40 c=90 a) a=130 b=60 c=90 b) a=60 b=130 c=90 c) a=40 b=50 c=90 d) a=50 b=40 c=90 no guessing and show work you.

recall that the sum of all interior angles in a triangle is 180°.

therefore, a + b + c = 180°

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.