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3 years ago

4x+7+2x+5 solve for X

Mathematics

2 answers:

Gelneren [198K]3 years ago

8 0

Answer:

x = - 1

Step-by-step explanation:

Let's solve

4x + 7 = 2x + 5

Subtract 2x from both sides.

4x + 7 −2x = 2x + 5 −2x

2x + 7 = 5

Subtract 7 from both sides.

2x + 7 − 7 = 5 −7

2x = −2

Divide both sides by 2.

2x / 2 = −2 / 2

x = −1

dalvyx [7]3 years ago

4 0

Answer:

Simplifying

4x + -7 = -2x + -5

Reorder the terms:

-7 + 4x = -2x + -5

Reorder the terms:

-7 + 4x = -5 + -2x

Solving

-7 + 4x = -5 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.

-7 + 4x + 2x = -5 + -2x + 2x

Combine like terms: 4x + 2x = 6x

-7 + 6x = -5 + -2x + 2x

Combine like terms: -2x + 2x = 0

-7 + 6x = -5 + 0

-7 + 6x = -5

Add '7' to each side of the equation.

-7 + 7 + 6x = -5 + 7

Combine like terms: -7 + 7 = 0

0 + 6x = -5 + 7

6x = -5 + 7

Combine like terms: -5 + 7 = 2

6x = 2

Divide each side by '6'.

x = 0.3333333333

Simplifying

x = 0.3333333333

Step-by-step explanation:

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2 years ago

mrs perry shares out 15 biscuits between 2 people with a ratio in 1:2 how many biscuits will they both get

Charra [1.4K]

There are 3 parts to the ratio so...
First we divide the total number of objects we are sharing (in this case 15 biscuits) by the number of parts in the ratio (3)
15 / 3 = 5
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1 x 5 = 5
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3 years ago

A new plasma-screen television has purchase price of 8590 if sales tax on this purchase is 773.10, find the sales tax rate

Nataly [62]

Answer:

9 %

Step-by-step explanation:

What % is 773.10 of $8,590?

X/100 = 773.10/8590 (x/100=is/of)

(733.10 * 100) / 8590

= 9

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2 years ago

Find the relative extrema, if any, of the function. Use the Second Derivative Test if applicable. (If an answer does not exist,

belka [17]

Answer:

We have the function g(x) = x^3 -15*x

First, to find extrema, we can find the zeros of the first derivative.

g'(x) = 3*x^2 -15

g'(x) = 0 = 3*x^2 - 15

x^2 = 15/3 = 5

x = √5

x = -√5

Now, watching at the second derivative we have:

g''(x) = 6*x

so when we have

g''(√5) = 6*√5 > 0 then x = √5 is a local minimum

g''(-√5) = -6*√5 < 0, then x = -√5 is a local maximum.

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3 years ago

What present $84 is $21?

choli [55]

84+21 105 or 84 Divided 21 equals is 4

I try

8 0

3 years ago

4x+7+2x+5 solve for X​

4x+7+2x+5 solve for X