Algbra 1

x varies directly with y and z x=1200,when y=20 and z=30. Find x when y=10 and z=20

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  1. x varies directly with y and z ---> x = k(yz)
    enter your given data:
    1200 = k(20*30)
    k = 2

    so x = 2yz

    now plug in your other y and z to find x

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