Math

She added 4, multiplied the sum by -5, and subtracted 12. She then doubled the result and got -34. What number did Christa started with?

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  1. work backwards.
    first we start with -34.
    from the second statement, it was said that she doubled it, but since we're working backwards, we divide -34 by 2:
    -34 / 2 = -17
    then subtracted by 12,, thus we add 12 by -17 :
    -17 + 12 = -5
    multiplied by -5,, thus we divide by -5:
    -5 / -5 = 1
    finally, she added 4,, thus we subtract by 4:
    1 - 4 = -3

    thus the number is -3

    hope this helps~ :)

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  2. Multiplyed by 4 then 7 added after subtracting 3 the result is 8 what is the number

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