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3 years ago

What is the answer to-2x+5=-31

Mathematics

2 answers:

7nadin3 [17]3 years ago

8 0

Answer:

x = 18

Step-by-step explanation:

Subtract 5 on both sides:

-2x + 5 =- -31

-5 -5

-2x = -36

Divide by -2 on both sides:

-2x = -36

/-2 /-2

x = 18

Neko [114]3 years ago

6 0

Answer: x=18

Step-by-step explanation:

first, add 5 to 31. then, divide both sides by -2. this gives you 18

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Simplify expression X^2+x-2/x^3-x^2+2x-2

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Answer:

$=\frac {x+2}{x^2+2}$ is the simplest form of given expression.

Step-by-step explanation:

The given question is $\frac{x^2+x-2}{x^3-x^2+2x-2}$

To solve the problem we have to group or split middle term and then factorise

$\frac{x^2+(2x-x)-2}{(x^3-x^2)+(2x-2)}$

Taking $x^2$ common from first two terms of denominator and 2 from next two terms

$= \frac{x^2+2x-x-2}{x^2(x-1)+2(x-1)}$

Now,taking x common from first two terms of numerator and -1 from next two terms and in denominator taking(x-1) common from both terms

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Now cancel out x-1 from both numerator and denominator we get

$=\frac {x+2}{x^2+2}$ is the required simplest form.

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