How do you solve #7b-10+31=9b#?

Question

1480 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-03-14T04:04:55

#21/2# or #10.5# in decimal form.

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#