Algebra 1

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what is the equations "The sum of two numbers is 75. The first is 9 more than 5 times the second. Find the first number?"
What is the equations "Jack's bowling score is 20 less than 3 times Jill's score. Thw sum of their scores is 220. Find the score of each?"

  • Algebra 1 -

    a + b = 75
    a = 5b+9
    or,
    a + b = 75
    a - 5b = 9
    so,
    6b = 66
    b=11 a=64
    ___________________

    jack = 3*jill - 20
    jack + jill = 220
    or,
    jack - 3jill = -20
    jack + jill = 220
    so,
    4jill = 240
    jill = 60 jack = 160

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