Question

6x-2.5x=423x+2.5x=55（x-5.5）*8=62.8

Answer 1

3x+2.5x=55

（3+2.5）x=55

5.5x=55

x=10

（x-5.5）*8=62.8

x-5.5=62.8/8

x-5.5=78.5

x=78.5+5.5

x=84

6x-2.5x=42

（6-2.5）x=42

x=42/3.5

x=12