Question

what move turns the first equation into the secon equation-15x - 20 =5(2x + 9)5(-3x - 4) = 5(2x + 9)

Answer 1

The greatest common factor between 15 and 20 is 5. Then,

-15x - 20 =5(2x + 9)

can be expressed as:

5(-3)x - 5(4) = 5(2x + 9)

5(-3x - 4) = 5(2x + 9)