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4 years ago

If 3x+2 = 15 what is X?

Mathematics

1 answer:

insens350 [35]4 years ago

5 0

3x+2=15
15-2 = 13

3x=13

Divid

Then X should give you
4.3333333333 ...

Then round

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X/13 - 1 = 5x/2 + 1/2 please answer the question pls pls pls pls

Morgarella [4.7K]

$\huge\underline{\red{A}\blue{n}\pink{s}\purple{w}\orange{e}\green{r} -}$

the given expression can be solved as follows ~

$\frac{x}{13} - 1 = \frac{5x}{2} + \frac{1}{2} \\$

taking LCM both the sides ,

$\frac{x - 13}{13} = \frac{5x + 1}{2} \\$

on cross multiplying ,

$(x - 13)2 = (5x + 1)13 \\ \\ \implies \: 2x - 26 = 65x + 13$

let's now gather the like terms at either sides of the equation ~

$65x - 2x = - 26 - 13 \\ \\ \implies \: 63x = - 39 \\ \\ \implies \: x = \frac{\cancel{ - 39}}{\cancel{63}}$

on simplifying the equation ,

$\implies \frac{-13}{21}\\$

hope helpful ~

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2 years ago

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4 years ago

Help pls... Show work

Triss [41]

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3 years ago

For each of the following, decide if the given series is a geometric series. A. 5+25x+125x2+625x3+3125x4+⋯ : Is this a geometric

Westkost [7]

Answer:

A. Yes.

B. Yes.

C. No.

Step-by-step explanation:

A. Yes. The sum of the series, $5 + 25x + 125x^{2} + 625x^{3} + 3125x^{4} + ...........$ is the sum of a geometric series.

The first term of the series $a_n$ = 5.

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B. Yes. The sum of the series, $5x^{7} + 5x^{8} + 5x^{9} + 5x^{10} + ............$ is also the sum of a geometric series.

The first term of the series $a_n = 5x^{7}$ .

The common ration or the ratio between successive terms (r) = $\frac{5x^{8} }{5x^{7} } = x$ (Answer)

C. No. The sum of the series, $5 + 5x + 5x^{2} + 5x^{4} + 5x^{8} + ...........$ is not the sum of a geometric series.

The first term of the series $a_n = 5$ .

(Answer)

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