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
SE NÃO ME ENGANO A RESPOSTA É A 10
Since D=MV, we can infer that M=D/V
That is your equation----------------^
k = - 3
given k + 
= 
subtract from both sides of the equation
k = - = - 
= - 3
Answer:
Let's make "b" the amount in the account.
A withdrawal means a reduction in the balance. So we have
b - 40
