Edward asked in 科學及數學數學 · 1 decade ago

algebraic expressions - equation

algebraic expressions - equation

(Write down an equation connecting the unknown)

3.Rose's money is less than half of Mary's by $120.Rose has $39.

Let $x be the amount that Mary has.

And also,It is the best to explain the answers and the questions.

1 Answer

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  • 1 decade ago
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    Let $x be the amount that Mary has

    x/2 - 120 = 39

    x/2 = 159

    x = 318

    Hence, Mary has $318

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