Answer:
x=8
Step-by-step explanation:
First we know that 14x +1 and 11x-21 are supplementary angles because they add to 180 degrees. That is the given. Now we need to make an equation.
(14x+1) + (11x-21) = 180
Simplify the equation
25x -20 =180
Addition property of equality
25x =200
Division property of equality
x =8
