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vi l
vi l asked in Science & MathematicsMathematics · 1 decade ago

Pre-algebra math question?

ok you have a rectangle and on one side it is xtimes4 and on the other side it is x+7 the perimeter is 44 inches

what is X?

i know that x=3 but how would you do the work?

or could someone show me the equation?

4 Answers

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  • Bookie
    1 decade ago
    Favorite Answer

    44 = 2(4x) + 2(x + 7)

    44 = 8x + 2x +14

    30 = 8x + 2x

    30 = 10x

    3 = x

  • NeaJ
    1 decade ago

    The formula for perimeter is twice the length added to twice the width.

    Let 4x the the length and x+7 the width.

    P = 2 (4x) + 2 (x+7)

    44=2 (4x) + 2 (x+7)

    use distribution to remove parenthesis

    44=8x + 2x +14

    group same terms together

    44 - 14 = 10x

    30=10x

    divide by 10 to have x

    x=3

  • Anonymous
    1 decade ago

    Perimeter = 2(4x) + 2(x+7) = 10x + 14 = 44 --->x = 3

  • Smumph45
    Lv 6
    1 decade ago

    2(4x) + 2(x + 7) = 44

    4x + x + 7 = 22

    5x = 15

    x = 3

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