3х + 3(х + 20) = 480

Question

3х + 3(х + 20) = 480

Answer 1

Объяснение:

3x+3x+60=480

6x=480-60

6x=420

x=420:6

x=70

Answer 2

3х + 3х +60=480

6х = 480-60

6х = 420

х = 70