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ollegr [7]
3 years ago
5

-5=3/4x-2 solve for x and please show your work!

Mathematics
1 answer:
Nookie1986 [14]3 years ago
3 0
-5 = \frac{3}{4} x - 2 equals x = -4.

First, simplify \frac{3}{4} x to \frac{3x}{4}. / Your problem should look like: -5 = \frac{3x}{4} - 2.
Second, multiply both sides by 4. / Your problem should look like: -20 = 3x -8.
Third, add 8 to both sides. / Your problem should look like: -20 + 8 = 3x.
Fourth, simplify -20 + 8 to -12. / Your problem should look like: -12 = 3x.
Fifth, divide both sides by 3. / Your problem should look like: - \frac{12}{3} = x.
Sixth, simplify \frac{12}{3} to 4. / Your problem should look like: -4 = x.
Seventh, switch sides. / Your problem should look like: x = -4, which is your answer. 

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Help please.... I have got this wrong 2xs only once chance left
Jet001 [13]

Answer:

a: 5x-1 = -6

b: 5x-1 = -6

        +1   +1

5x = -5

divide

x = -1

7 0
3 years ago
What is the area of a triangle with a base of 7cm and a height of 4 cm?
Aloiza [94]
You have to multiply. It is 28cm I think
7 0
3 years ago
A Circle has a circumference of 16yds. Find the Area. <br><br> PLS ANSWER NOW
postnew [5]
a= \frac{16^{2}}{4 \pi } Solve the equation :)
5 0
3 years ago
I AM IN DESPERATE NED OF QUICK HELP PLEASEEEEEEEEEEEEEEEEEEEEEE!!!!!!!!!!!!!!!!!!!!!!
rosijanka [135]

Answer:

16

Step-by-step explanation:

To solve this equation, we need the formula for perfect squares:

  • (a + b)^2 = a^2 + 2ab + b^2

or

  • (a - b)^2 = a^2 - 2ab + b^2 <em>this is the formula we will use because the signs match the one in the question</em>.

Knowing these, we can set up an equation that assumes that the answer we will end up with is a perfect square.

Work:

(v - x)^2 = v^2 -8v + x^2

  • this is the setup for being able to solve for the unknown x, now we need to solve for x.

(v - x)^2 = v^2 - 8v + x^2 (I replaced 2ab with 8v because I'm setting up this question to be a perfect square).

(v - x) (v - x) = v^2 - 8v + x^2

  • multiply the left side. Remember that your answer will not be v^2 + x^2, but v^2 - 2vx +x^2.

v^2 - 2vx + x^2 = v^2 + 8v + x^2

  • Divide like terms and isolate the variable. In this case, v^2 and x^2 are on both sides, so dive them and they will be canceled out.

2vx = 8v

  • divide by 2v and you will have your value for x.

x = 4

  • Now we plug x into our original equation equation for perfect squares.

(v - 4)^2 = v^2 - 8v + 16

Our final answer is 16.

5 0
4 years ago
How to write a number increased by 11 is eaqual to twice the number decreased by 12
Nataliya [291]

Answer: The number is 23

Step-by-step explanation:

Let x be the [number]

Rephrase the expression

a number increased by 11 is equal to twice the number decrease by 12

x+11=2x-12

Add 12 on both sides

x+11+12=2x-12+12

x+23=2x

Subtract x on both sides

x+23-x=2x-x

x=23

Hope this helps!! :)

Please let me know if you have any questions

3 0
3 years ago
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