How do you solve #-3x + 7x = 28#?

Question

1178 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-02-28T22:47:45

See the entire solution process below:

First, combine like terms on each side of the equation:

#(-3 + 7)x = 28#

#4x = 28#

Now, divide each side of the equation by #color(red)(4)# to solve for #x# while keeping the equation balanced:

#(4x)/color(red)(4) = 28/color(red)(4)#

#(color(red)(cancel(color(black)(4)))x)/cancel(color(red)(4)) = 7#

#x = 7#