Answer:
x=15
Step-by-step explanation:
Like solving all Algebra equations, it is very important to make sure that the variables (In this case x) are on one side and the numbers are on the other side.
85-3x=40
First, let's subtract 40 on both sides
45-3x=0
Add 3x to both sides
45=3x
Let's divide both side by 3
And we get...
x=15
