MA001: College Algebra Sections Unit 1: Basic Algebra Concepts 1.3: Linear Equations in One Variable 1.3.5: Solving Equations involving Fractions Tyler Wallace's "Linear Equations - Fractions" and "Linear Equations - Distributing with Fractions"

This is the question that I didn’t understand could anyone please help me to this question.
it’s first question
1/2=3/4(2x-4/9
and the second question.
2/3(x+4)={5/6x-7/15