Step-by-step explanation
- First subtract the 5 from both sides so you end up with I2x+1I =7
- Then take the absolute value of I2x+1I and u end up with 2x+1
currently u should end up with 2x+1=7
3. now subtract one from both sides and you get 2x=6, then divide both sides by 2 and you get x=3
and if u substitute 3 for x back in the original you get 12
