Answer:
b= 4
Explanation:
On order to get the answer of b first you need to 'undo' the equation.
1.First start by multiply both sides of the equation by 3. (you need to do this to cancel out the denominator of 3)
Now the equation should read 5b+1= 21.
2. Subtract 1 from each side of the equation. You need to get b and its coefficient alone on one side of the equation. The equation should now read 5b= 20
3. Divide both sides by 5. You now need to get b alone so you can figure out its value, you do this be getting rid of the coefficient.
4. You are left with b=4
5. Check your answer. 4x5=20 20+1= 21 21/3=7
Hope this helps <3