Look at each problem. Then decide if it is an equation or an expression. Check all the equations. A number decreased by three is seven. 9 + n the product of a number and eleven The quotient of a number and six is two. x – 5 = 21

1. Equation

2. Expression

3. Equation

4. Equation

Step-by-step explanation:

To decide whether the given problems are an equation or an expression.

An equation is of the form:

LHS (Left Hand Side) expression = RHS(Right Hand Side) expression

Let us have a look at each problem one by one:

1. A number decreased by 3 is 7.

Let the number be

As per the given statement:

Therefore, is an equation.

2. 9+n the product of a number and eleven.

Let the number be

As per the given statement:

No equal to sign, so it is an expression.

3. The quotient of a number and 6 is 2.

Let the number be

As per the given statement:

Therefore, it is an equation.

4.

Therefore, it is an equation.

lol we need to see what the question is asking about

step-by-step explanation:

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)