All categories

3 years ago

What is 3x + 77 = 4x + 54

Mathematics

2 answers:

loris [4]3 years ago

8 0

Answer:

Simplifying

3x + 77 = 4x + 54

Reorder the terms:

77 + 3x = 4x + 54

Reorder the terms:

77 + 3x = 54 + 4x

Solving

77 + 3x = 54 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.

77 + 3x + -4x = 54 + 4x + -4x

Combine like terms: 3x + -4x = -1x

77 + -1x = 54 + 4x + -4x

Combine like terms: 4x + -4x = 0

77 + -1x = 54 + 0

77 + -1x = 54

Add '-77' to each side of the equation.

77 + -77 + -1x = 54 + -77

Combine like terms: 77 + -77 = 0

0 + -1x = 54 + -77

-1x = 54 + -77

Combine like terms: 54 + -77 = -23

-1x = -23

Divide each side by '-1'.

x = 23

Simplifying

x = 23

Step-by-step explanation:

I hope its helps

Bess [88]3 years ago

4 0

Answer: 23

Step-by-step explanation: hope this is right!

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3 years ago

the equation is -2x² = 4-3 (x + 1) and the question is justify that it is a 2nd degree equation with the unknown x complete.

Serggg [28]

Answer:

Please check the explanation.

Step-by-step explanation:

Given the equation

-2x² = 4-3 (x + 1)

-2x² = 4-3x-3

-2x² = -3x -7

0 = 2x² -3x -7

We know that the degree of the equation is the highest power of x variable in the given equation.

In the equation 0 = 2x² -3x -7 the highest power of x variable in the given equation is 2.

Thus, the degree of the equation is 2.

Also in the equation 0 = 2x² -3x -7, the unknown variable is 'x'.

Let us determine the value 'x'

2x² -3x -7 = 0

Add 7 to both sides

$2x^2-3x-7+7=0+7$

$2x^2-3x=7$

Divide both sides by 2

$\frac{2x^2-3x}{2}=\frac{7}{2}$

$x^2-\frac{3x}{2}=\frac{7}{2}$

Add (-3/4)² to both sides

$x^2-\frac{3x}{2}+\left(-\frac{3}{4}\right)^2=\frac{7}{2}+\left(-\frac{3}{4}\right)^2$

$x^2-\frac{3x}{2}+\left(-\frac{3}{4}\right)^2=\frac{65}{16}$

$\left(x-\frac{3}{4}\right)^2=\frac{65}{16}$

$\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}$

solving

$x-\frac{3}{4}=\sqrt{\frac{65}{16}}$

$x-\frac{3}{4}=\frac{\sqrt{65}}{\sqrt{16}}$

$x-\frac{3}{4}=\frac{\sqrt{65}}{4}$

Add 3/4 to both sides

$x-\frac{3}{4}+\frac{3}{4}=\frac{\sqrt{65}}{4}+\frac{3}{4}$

$x=\frac{\sqrt{65}+3}{4}$

similarly solving

$x-\frac{3}{4}=-\sqrt{\frac{65}{16}}$

$x=\frac{-\sqrt{65}+3}{4}$

So the solution of the equation will have the values of x such as:

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hope this helps

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