How do you solve #x/2-9=-21#?

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Answer 1 · 2017-07-21T23:00:29

See a solution process below:

Step 1) Add #color(red)(9)# to each side of the equation to isolate the #x# term while keeping the equation balanced:

#x/2 - 9 + color(red)(9) = -21 + color(red)(9)#

#x/2 - 0 = -12#

#x/2 = -12#

Step 2) Multiply each side of the equation by #color(red)(2)# to solve for #x# while keeping the equation balanced:

#color(red)(2) xx x/2 = color(red)(2) xx -12#

#cancel(color(red)(2)) xx x/color(red)(cancel(color(black)(2))) = -24#

#x = -24#