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14 September, 22:09

Stan worked 4 years less than Marco. This year Stan has worked 29 years. If b is how long Marco worked, the equation b - 4 = 29 respresents this situation. How can you get the variable alone on one side of the equation?

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  1. 14 September, 22:26
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    Add 4 on both sides.

    In the equation there is a - 4.

    If - 4+4=0, that is how you would get rid of the - 4.

    But, you need to add 4 to 29 to really get rid of the - 4.

    So, 29+4 is 33.

    b=33
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