Answer:
x = 1/6
Step-by-step explanation:
- 3x + 21 - x = 2x + 20
Subtract 20 from each sides
- 3x + 21 - 20 - x = 2x + 20 - 20
-3x + 1 - x = 2x
Combine like terms
-3x - x + 1 = 2x
-4x + 1 = 2x
Add 4x on each sides
-4x + 4x + 1 = 2x + 4x
1 = 6x
Divide both sides by 6
1/6 = 6x/6
1/6 = x
The answer is x = 1/6
