(NOT MY ANSWER)
But its the right one i got it from this website:
geteasysolution.com
Simple and best practice solution for 24-10b=9 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework
Simplifying 24 + -10b = 9 Solving 24 + -10b = 9 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-24' to each side of the equation. 24 + -24 + -10b = 9 + -24 Combine like terms: 24 + -24 = 0 0 + -10b = 9 + -24 -10b = 9 + -24 Combine like terms: 9 + -24 = -15 -10b = -15 Divide each side by '-10'. b = 1.5 Simplifying b = 1.5