Question

2x + 8 = 20

Answer 1

Get x alone by subtracting 8 from both sides
2x=12

Divide by 2 to get x alone
x=6

Answer 2

transpose 8 to right hand side
\[2x=20-8\]
\[2x=12\]
\[x=12/2\]
\[x=6\]

Answer 3

2x = 20
divide by 2
x=6