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Dave pays two-fifth of his salary for rent, 16% of the salary for grocery and one-fourth of the salary for travel. He saves the remaining $1,368. How much does he earn?
Can anybody help me?

  • math -

    Let x = the amount he earns.

    0.4x + 0.16x + 0.25x + 1368 = x

    0.81x + 1,368 = x
    1,368 = x - 0.81x
    1,368 = 0.19x
    1,368/0.19 = x
    7,200 = x

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