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Posted by on Thursday, October 3, 2013 at 8:14pm.

A triangle has a perimeter of 81 inches. The side lengths can be found by x, 3x-1, and 4x+2
what is the value of x?

  • Algebra 1 - , Thursday, October 3, 2013 at 8:18pm

    81 = x + 3x - 1 + 4x + 2

    81 = 8x + 1

    80 = 8x

    10 = x

  • Algebra 1 - , Thursday, October 3, 2013 at 8:35pm

    x + 3x-1 + 4x +2 = 81
    8x+ 1 = 81
    8x+1-1 = 81-1
    8x = 80
    8x/8 = 80/8

    x = 10

  • Algebra 1 - , Saturday, October 29, 2016 at 6:05pm

    10

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