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3 years ago

Does anyone know what 8x+4 = 3x+2?

Mathematics

2 answers:

frosja888 [35]3 years ago

5 0

Answer:

x= -2/5 or -0.4

Step-by-step explanation:

an acronym that i use that helps me is D.C.M.S. ( distribute, combine like terms, move variable, solve) so first you want to distribute, but since there is no need for distribution in this problem, we can skip that, as well as combining like terms. so then, we have to move the variable. i moved the 3x by subtracting it on both sides. so now we have 5x+4=2. then you just solve from there; subtract 4: 5x= -2; divide by 5. hope this helps :)

marissa [1.9K]3 years ago

3 0

Answer:

8 + 4 = 3 + 2 8x+4=3x+2 8x+4=3x+2 8 + 4 − 4 = 3 + 2 − 4

Step-by-step explanation:

Subtract 4 4 4 from both sides of the equation

I don't know I'm not good at math.

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The local zoo had two water tanks that are leaking. One tank contains 12 gallons of water and is leaking at a constant rate of 3

fiasKO [112]

Once they're empty, I guess.
Did you put it the wrong way around?
Because it would be after four hours in this case.

3 0

3 years ago

Raphael paid $167 for a camera during a 75% off sale. what was the cameras regular price?

mihalych1998 [28]

As the camera was at 25% of the original price, this means you've got to multiply this number to by 4 to get the original price.
167*4= 668
Therefore, the camera's regular price is $668
Hope this helps :)

6 0

3 years ago

Read 2 more answers

In a car dealership, all of the vehicles are either

mafiozo [28]

Answer:

The number of sedans before any vehicle was sold is 168

Step-by-step explanation:

Let's define the variables:

x = number of sedans

y = number of SUVs

We know that:

"If 36 sedans are sold and 36 SUVs are added, there will be an equal number of sedans and SUVs"

If 36 sedans are sold, the new number of sedans is:

x - 36

if 36 SUVs are added, the new number of SUVs is

y + 36

And these numbers are equal, then:

x - 36 = y + 36

We also know that:

" If 8 SUVs are sold and 8 sedans are added, there will be twice as many

sedans as SUVs. "

If 8 SUVs are sold, the new number of SUVs will be:

y - 8

If 8 sedans are added, the new number of sedans wil be:

x + 8

From this we can write the equation:

(x + 8) = 2*(y - 8)

x + 8 = 2*y - 16

Then we have two equations:

x - 36 = y + 36

x + 8 = 2*y - 16

We want to find the number of sedans, x, then we need to isolate the other variable in one of the equations, let's isolate y in the first one:

Let's isolate x in the first one:

x - 36 - 36 = y

x - 72 = y

Now we can replace it in the other equation:

x + 8 = 2*y - 16

x + 8 = 2*(x - 72) - 16

Now we can solve this for x.

x + 8 = 2*x - 144 - 16

8 + 144 + 16 = 2x - x

168 = x

The number of sedans before any vehicle was sold is 168

7 0

3 years ago

Can someone help me please??

worty [1.4K]

Answer:

<em>The little brother should place the mirror at 36 ft from the base of the tree to properly see its top</em>

Step-by-step explanation:

<u>Similar Triangles </u>

Two triangles are defined as similar if their corresponding angles are congruent and the corresponding sides are in proportion. The triangle formed by the kid and the ground and the triangle formed by the tree and the ground are similar since the angle of reflection over the mirror is the same, i.e. the light travels in a straight line. This means that we can set this proportion

$\displaystyle \frac{x}{72}=\frac{2}{4}$

Solving for x

$\displaystyle x=\frac{2\times 72}{4}$

$\boxed{x=36\ ft}$

The little brother should place the mirror at 36 ft from the base of the tree to properly see its top

4 0

4 years ago

13 inches Find the surface chea of a rectangular prism with a height of 6 inches a width of 7 inches, and a length of 13 inches.

stiv31 [10]

Answer:

422 Square Inches

Step-by-step explanation:

6x7=42

7x13=91

6x13=78

(2)42+(2)91+(2)78=422

You are multiplying each calculation by 2 because a rectangular prism has 6 sides. 2 sides height x width, 2 sides height x length, and 2 sides width x length

6 0

3 years ago