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3 years ago

10 POINTS!!!!do the question in the image

Mathematics

1 answer:

RUDIKE [14]3 years ago

4 0

Answer:

4x+3=27

Step-by-step explanation:

So there are 4 x so the first part of the 3quation should be 4x then you have 3 so you add three. Your equation should now be 4x+3, and then the sum of all that should equal 27. So therefore the equation is 4x+3=27

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X+5=9x^2+X+1 please help me

gayaneshka [121]

Answer:

Simplifying

x + 5 = 9x2 + x + 1

Reorder the terms:

5 + x = 9x2 + x + 1

Reorder the terms:

5 + x = 1 + x + 9x2

Add '-1x' to each side of the equation.

5 + x + -1x = 1 + x + -1x + 9x2

Combine like terms: x + -1x = 0

5 + 0 = 1 + x + -1x + 9x2

5 = 1 + x + -1x + 9x2

Combine like terms: x + -1x = 0

5 = 1 + 0 + 9x2

5 = 1 + 9x2

Solving

5 = 1 + 9x2

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9x2' to each side of the equation.

5 + -9x2 = 1 + 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0

5 + -9x2 = 1 + 0

5 + -9x2 = 1

Add '-5' to each side of the equation.

5 + -5 + -9x2 = 1 + -5

Combine like terms: 5 + -5 = 0

0 + -9x2 = 1 + -5

-9x2 = 1 + -5

Combine like terms: 1 + -5 = -4

-9x2 = -4

Divide each side by '-9'.

x2 = 0.4444444444

Simplifying

x2 = 0.4444444444

Take the square root of each side:

x = {-0.666666667, 0.666666667}

Step-by-step explanation:

7 0

3 years ago

Select whether the equation has a solution or not.

vredina [299]

Answer: The equation has a solution .

Step-by-step explanation:

Since we have given that

$\sqrt{x+1}=7-2\sqrt{x}$

Squaring on both the sides, we get that,

$x+1=(7-2\sqrt{x})^2\\\\x+1=49+4x-28\sqrt{x}\\\\3x+48-28\sqrt{x}=0$

Let $\sqrt{x}=y\implies x=y^2$

So, our equation becomes,

$3y^2-28y+48=0\\\\y=\dfrac{14}{3}\pm \dfrac{2\sqrt{13}}{3}\\\\\sqrt{x}=\dfrac{14}{3}\pm \dfrac{2\sqrt{13}}{3}\\\\x=(\dfrac{14}{3}\pm \dfrac{2\sqrt{13}}{3})^2$