shadowy2077 shadowy2077

23-09-2018
Mathematics

contestada

seven less than a number is fifteen

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camicastaneda camicastaneda

23-09-2018

7-x=15

7-(-8)=15

what we have to do in order to solve this is change the 2 subtraction signs into a addition sign because a negative plus a negative makes a positive.

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angelikipana angelikipana

23-09-2018

actually, its the other way around, its not 7-x=15 but
[tex]x - 7 = 15 \\ x = 15 + 7 \\ x = 22[/tex]

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