Question

3 - 1/3 b = 1/3 b - 7

Answer 1

`3 - (1)/(3) b = (1)/(3) b - 7 \\ \\ 3 - (b)/(3) = (b)/(3) - 7 \\ \\ 9 - b = b - 21 \\ \\ 9 = b - 21 + b \\ \\ 9 = 2b - 21 \\ \\ 9 + 21 = 2b \\ \\ 30 = 2b \\ \\ (30)/(2) = b \\ \\ 15 = b \\ \\ b = 15 \\ \\`

The final result is: b = 15.

You can check the answer if you substitute in 15 for the variables, and you should end up with a number equaling the same number.

Answer 2

Step 1: Simplify both sides of the equation.
3−13b=13b−7

Simplify
−13b+3=13b−7

Step 2: Subtract 1/3b from both sides.−13b+3−13b=13b−7−13b−23b+3=−7

Step 3: Subtract 3 from both sides.−23b+3−3=−7−3−23b=−10Step 4: Multiply both sides by 3/(-2).(3−2)*(−23b)=(3−2)*(−10)b=15S your answer is b=15
I hoped i help :)