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1 July, 16:19

3. If 4 is subtracted from twice a number the result is 10 less than the number

find the number.

4. Three times a number divided by two is the number divided by 4 Find the number.

5. An integer, n, is added to 2, and that sum is then multiplied by 3. That result is 5 less than the original integer. What is the integer?

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  1. 1 July, 16:22
    0
    3.

    2x - 4 = 10

    Add 4 to both sides.

    2x = 14

    Divide both sides by 2.

    x = 7

    4.

    3 (x/2) = x/4

    Distributive property.

    3x/2 = x/4

    Convert denominators to a common number.

    6x/4 = x/4

    Multiply both sides by 4.

    6x = x

    Subtract x from both sides.

    5x = 0

    Divide both sides by 5.

    x = 0

    This equation is equal to 0.

    5.

    3 (n + 2) = n - 5

    Distributive property.

    3n + 6 = n - 5

    Subtract n from both sides.

    2n + 6 = - 5

    Subtract 6 from both sides.

    2n = - 11

    Divide both sides by 2.

    n = - 5.5
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