Answer :

BananaOnYourFace
7 - 3 = 4

4 x .... = 40

4 x 10 = 40
Illuminati750
Hello, 

x= the number
3x= three times the number

seven decreased by three times a number is forty, then:

7-3x=40
-3x=33
x=-11

Answer: the number is -11

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