Algebra

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Use the substitution method to solve the linear system.

1/8p+3/4q=7
3/2p-q=4

Thanks.

  • Algebra -

    1st times 8 ----> p + 6q = 56 or p = 56-6q

    2nd times 2 ---> 3p - 2q = 8

    3(56-6q) - 2q = 8
    168 - 18q - 2q = 8
    -20q = -160
    q = 8

    then p = 56-6(8) = 8

    p= 8 and q = 8

    Notice how for both of your last two posts, I got rid of fractions to make the equations much more manageable.

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