What type of angles are between the parallel lines, but different side of the transversal

Ily begins solving the equation 4(x – 1) – x = 3(x + 5) – 11. her work is shown below. 4(x – 1) – x = 3(x + 5) – 11 4x – 4 – x = 3x + 15 – 11 3x – 4 = 3x + 4 how can her partial solution be interpreted?

What is the value of x in the equation 6(x + 1) – 5x = 8 + 2(x – 1)?

What is the relationship between all triangles that can be drawn given the same three angles