How many of 8ft 2x4 needed for plates

△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Can someone answer this question for me