What is the first step to solving a multiplication or division equation?

If the value of x increases by 5, how does the value of m(x + 3) change? a) it increases by 5m. b) it increases by 8m. c) it decreases by 5m. d) it decreases by 8m.

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i