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3 September, 15:13

Sum of two number is 72. One number is 30 more than the other. Let x be the smallr number and y be the bigger number. Write an Equation.

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  1. 3 September, 15:29
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    x + (x+30) = 72

    Step-by-step explanation:

    if x is the smaller number and y is the bigger number, then according to the condition (one number is 30 more than the other) y=x+30.

    It the sum of the two numbers is 72, then x+y=72.

    After substitution y=x+30:

    x + (x+30) = 72; - the required equation.

    ⇔ 2x=42; ⇒ x=21 (it is the smaller number)

    y=51 (it is the bigger number).
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