Question

can anyone please explain the step.​

Answer 1

Step-by-step explanation:

$(90 - ( \frac{180 - 6}{2})) \\ = >(90 - \frac{ 180}{2} + \frac{6}{2}) \\ = > \frac{180 - 180 + 6}{2} \\ = > \frac{6}{2} \\ = > 3$