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3 years ago

-13=5(1+4x)-2x With steps

Mathematics

2 answers:

Allushta [10]3 years ago

8 0

-13=5+20x-2x
-13=5+18x
-18=18x
x= -1

patriot [66]3 years ago

7 0

How to get answer by Mimiwhatsup:

$\mathrm{Switch\:sides}\\5\left(1+4x\right)-2x=-13\\\mathrm{Expand}\:5\left(1+4x\right):\quad 5+20x\\5+20x-2x=-13\\\mathrm{Add\:similar\:elements:}\:20x-2x=18x\\5+18x=-13\\\mathrm{Subtract\:}5\mathrm{\:from\:both\:sides}\\5+18x-5=-13-5\\Simplify\\18x=-18\\\mathrm{Divide\:both\:sides\:by\:}18\\\frac{18x}{18}=\frac{-18}{18}\\Answer: x=-1$

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alukav5142 [94]

Responda:

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Explicação passo a passo:

Dado que:

Custo total de bolsa e sandália = 74,00

Deixei :

Custo da sandália = x

Custo da bolsa = x - 23

Preço da sandália:

x + (x - 23) = 74

x + x - 23 = 74

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Step-by-step explanation:

Taking into account that the speed of all cars traveling on this highway have a normal distribution and we can only know the mean and the standard deviation of the sample, the confidence interval for the mean is calculated as:

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