5 times a number subtracted from 12 is triple the number

1 answer:

6 0

5x-12=3x

Let's solve your equation step-by-step.
5x−12=3x
Step 1: Subtract 3x from both sides.
5x−12−3x=3x−3x
2x−12=0
Step 2: Add 12 to both sides.
2x−12+12=0+12
2x=12
Step 3: Divide both sides by 2.
2x/2=12/2

x=6

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What is the solution to this equation 1/2n^2+18=0

ololo11 [35]

Answer:

n = ±6 .

Step-by-step explanation:

A quadratic equation is given to us and we need to find out the solution of the given equation . The given equation is ,

$\rm\implies -\dfrac{1}{2}n^2+18=0$

Subtracting 18 both sides ,

$\rm\implies -\dfrac{1}{2}n^2 = -18$

Multiplying both sides by -2 ,

$\rm\implies -2\times\dfrac{1}{2}n^2 = -2\times -18$

On simplyfing , we get ,

$\rm\implies n^2= 36$

Putting squareroot both sides ,

$\rm\implies n= \sqrt{36}$

This equals to ,

$\rm\implies \boxed{\quad\blue{\rm n =\pm 6 }}$

Hence the value of n is ±6 .

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