Answer:
x= 59°
Equation:
x+z°=90°
x+31°=90°
90°-31°=x
90°-31°=59°
Explanation:
So if Z and X are complementary angles, means that:
x+z°=90°
So if z=31 then the equation becomes:
x+31°=90°
If we flip the equation to becoming solvable then the equation becomes:
90°-31°=x
Now we solve:
90°-31°=59°
Hopes this helps!!