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Sagot :
[tex]x-\ number\\\\
30\%=\frac{12}{x}\ \ \ \ | multiply\ by\ x\ \ and\ \ \ x \neq 0\\\\
30\%x=12\\\\
\frac{30}{100}x=12\\\\
0.3x=12\ \ \ \ | divide\ by\ 0.3\\\\
x=40\\\\
12\ is\ 30\%\ of\ 40.[/tex]
let
x-----------> the number
we know that
[tex]30[/tex] % is equal to [tex] \frac{30}{100} [/tex]
[tex] (\frac{30}{100})*x=12 [/tex]
multiply by 100 both sides
[tex]30*x=1200[/tex]
divide by 30 both sides
[tex]x= \frac{1200}{30} \\ x=40 [/tex]
the answer is
the number is [tex]40[/tex]
x-----------> the number
we know that
[tex]30[/tex] % is equal to [tex] \frac{30}{100} [/tex]
[tex] (\frac{30}{100})*x=12 [/tex]
multiply by 100 both sides
[tex]30*x=1200[/tex]
divide by 30 both sides
[tex]x= \frac{1200}{30} \\ x=40 [/tex]
the answer is
the number is [tex]40[/tex]
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