How do you solve #7b-10+31=9b#? Algebra Linear Equations Two-Step Equations and Properties of Equality 1 Answer X D. · Stefan V. Mar 14, 2018 #21/2# or #10.5# in decimal form. Explanation: Start by subtracting the variables, so #9b-7b=2b#. After that, you want to add #31+(-10)=21# So 21 = 2b# Then divide both sides by #2# to get #21/2 = b# or #b = 10.5# Answer link Related questions How do you solve two step equations? How do you check solutions to two step equations? What is an example of a two step equation with no solution? How do I check to see if the solution is 1 for the equation #2x+1=3#? Is there more than one way to solve a 2 step equation? How do you solve #-m+3=3#? How do you solve #-5y-9=74#? How do you solve #5q - 7 = \frac{2}{3}#? How do you solve #0.1y + 11 =0#? How do you solve #\frac{5q-7}{12} = \frac{2}{3}#? See all questions in Two-Step Equations and Properties of Equality Impact of this question 605 views around the world You can reuse this answer Creative Commons License