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How to solve an equation by combing like terms

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How to solve an equation by combining liked terms. -3z 1=7

Jan 21st, 2015

If it is -3z-1=7

         -3z-1+1=7+1

         -3z=8

           z=-8/3

If it is -3z+1=7

          -3z+1-1=7-1

         -3z=6

            z=6/-3=-2

Jan 21st, 2015

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Jan 21st, 2015
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Jan 21st, 2015
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