You can put this solution on YOUR website!
Complementary angles are angles whose values, when added together, equal 90º.
Let angle A equal "x+30" and angle B equal "x", as the instructions state that angle A is thirty more than angle B.
Now you create an equation using this.
Combine your like terms, so your variables(x).
Subtract the 30 from both sides, since the 30 is positive, to cancel it out.
Divide both sides by 2 since the x has a coefficient, or number in front of it. You want to get the variable totally alone on one side of the equation.
Now check the answer by putting it back into the equation.
There's your answer.
Hope this helps!