1. (4.8x + 15.5) + (2.1x - 12.2) 2. (7x + 8) - (3x + 12) 3. (0.5x + 0.74) + (0.5x - .25)

Hey there :)

In all these questions, we should combine the like terms to simplify

1) (4.8x + 15.5) + (2.1x - 12.2)
     4.8x + 2.1x + 15.5 - 12.2
                      ↓
              6.9x + 3.3

2) (7x + 8) - (3x + 12)
      7x - 3x + 8 - 12
                  ↓
              4x - 4

3) (0.5x + 0.74) + (0.5x - 0.25)
      0.5x + 0.5x +0.74 - 0.25
                      ↓
                 x + 0.49

It's proportional

Step-by-step explanation: