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3 years ago

Solve 15-2x=3x the solution is x=

Mathematics

2 answers:

Vesnalui [34]3 years ago

8 0

Answer:

x=3

Step-by-step explanation:

15-2x=3x

solve for x:

15=5x

divided by 5:

3=x

Xelga [282]3 years ago

8 0

Answer:

x = 3

Step-by-step explanation:

15 -2x = 3x {Add 2x to both sides}

15 = 3x + 2x

15 = 5x

15/5 = x {divide both sides by 5}

x = 3

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Solve for x.

Ivahew [28]

ANSWER

$x=\frac{2-\sqrt{10}} {3}$

or

$x=\frac{\sqrt{10}+2} {3}$

We have

$3x^2-4x-2=0$

Since we cannot factor easily, we complete the square.

Adding 2 to both sides give,

$3x^2-4x=2$

Dividing through by 3 gives

$x^2-\frac{4}{3}x= \frac{2}{3}$

Adding $(-\frac{2}{3})^2$ to both sides gives

$x^2-\frac{4}{3}x+(-\frac{2}{3})^2= \frac{2}{3}+(-\frac{2}{3})^2$

The expression on the Left Hand side is a perfect square.

$(x-\frac{2}{3})^2= \frac{2}{3}+\frac{4}{9}$

$\Rightarrow (x-\frac{2}{3})^2= \frac{10}{9}$

$\Rightarrow (x-\frac{2}{3})=\pm \sqrt{\frac{10}{9}}$

$\Rightarrow (x)=\frac{2}{3} \pm {\frac{\sqrt{10}}{3}$

Splitting the plus or minus sign gives

$x=\frac{2- \sqrt{10}} {3}$

or

$x=\frac{\sqrt{10}+2} {3}$

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3 years ago

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Convert this rational number

Olegator [25]

Answer:

0.25

Step-by-step explanation:

1 divided by 4 = 0.25

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3 years ago

Doubling the quantity of a number decreased by six is less than negative thirty-six

natima [27]

Doubling (2 times ) the quantity (indicates a group) of a number (x) decreaded by (-) 6 (6) is less than (<) negative 36 (-36

2 times (x-6)<-36
divide both sides by 2
x-6<-36
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Two thirds plus one sixth

lozanna [386]

Answer:

5/6

Step-by-step explanation:

2/3=4/6 and 4/6+1/6=5/6

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