How do you solve #1/2 x = 40#?

1 Answer
May 21, 2015

Consider that you can move #1/2# to the right of your expression (but inverting it) as:
#x=(2/1)40#
So that #x=40*2=80#
Remember that your equation is like a balance; everything you move from one side to the other (of the equal sign) must change sign. In this case on the left you had a division by #2#...it goes to the right as a multiplication by #2#.
:-)