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LUCKY_DIMON [66]
3 years ago
8

If LN = 6x - 5, LM = x + 7, and MN = 3x + 20, find MN

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
5 0

Answer:

68

Step-by-step explanation:

LM   +    MN     =   LN

x + 7  + 3x + 20 = 6x - 5

           4x + 27 = 6x - 5

          -4x         -4x      

                   27 = 2x - 5

                    +5        +5

                   32  = 2x

                   ÷2   ÷2    

                    16 = x

MN: 3x + 20

      3(16) + 20

        48   + 20

              68

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