Answer:
[tex]\boxed{30^{\circ}+x=90^{\circ}}[/tex]
Step-by-step explanation:
Angles that add up to 90° are called complementary angles. In this problem, we have two angles. The first one is 30° and the second one is x degrees. Thus we don't know the second angle. In this way, we need to find an equation such that satisfies the definition of complementary angles. This equation is as follows:
[tex]\boxed{30^{\circ}+x=90^{\circ}}[/tex]
By isolating x, we can find the value of the complementary angle to 30 degrees:
[tex]x=90^{\circ}-30^{\circ} \\ \\ \boxed{x=60^{\circ}}[/tex]
