PLEASE HELP!! You have to solve for x but it’s the similar triangles way

3.4a=57.8 what is the the value of a

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis

The product of (7x-2) and (20-3x)/4. when x=4