Mathematics: 12b + 9 = 12b + 11 what’s the answer

So, if we change the percentages, to decimal notation, 40 to 40/100 or 0.40 and so onwe get so.. whatever the addition of those two alloys is, it must equate the mixture of 50% copper, that is solve for x...

12b + 9 = 12b + 11 what’s the answer - id12912117282186, marshunsanders

Ответ:

kaylijocombs

31.01.2022

Mathematics

no solutions

Step-by-step explanation:

12b + 9 = 12b + 11

Subtract 12b from each side

12b-12b + 9 = 12b-12b + 11

9 = 11

This is never true, so there are no solutions

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Ответ:

victoriadenning1

04.07.2022

Mathematics

So, if we change the percentages, to decimal notation, 40 to 40/100 or 0.40 and so on

we get $\bf \begin{array}{llll}
&quantity&\textit{copper \%}&\textit{copper quantity}\\
&------&------&------\\
\textit{40\% alloy}&x&0.40&(x)(0.40)\\
\textit{60\% alloy}&500&0.60&(500)(0.60)\\
------&------&------&------\\
mixture&x+500&0.50&(x+500)(0.50)
\end{array}$

so.. whatever the addition of those two alloys is, it must equate the mixture of 50% copper, that is $\bf (x)(0.40)+(500)(0.60)=(x+500)(0.50)$

solve for "x"

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12b + 9 = 12b + 11 what’s the answer

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