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Posted by on Sunday, October 2, 2011 at 6:19pm.

2(a-4)+15=13

Please show step by step

  • algebra - , Sunday, October 2, 2011 at 6:22pm

    2(a-4)=-2
    a-4=-1
    a=3

  • algebra - , Sunday, October 2, 2011 at 6:24pm

    2(a-4)+15=13

    2a - 8 + 15 = 13

    2a + 7 = 13

    2a + 7 - 7 = 13 - 7

    2a = 6

    a = 6/2

    a = 3

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