Question

I think of a number, double it, and subtract two. I get nine.
a)
Using the statement above, form an equation.
Use the letter 'x' for the unknown number.
b)
Solve the equation.​

Answer 1

Answer:

a) 2x - 2 = 9

b) x = 5.5

Step-by-step explanation:

I think of a number

→ Lets call that number "x"

double it

→ 2x

and subtract two

→ 2x - 2

I get nine

→ 2x - 2 = 9

In an equation our aim is to make "x" the subject and solve it to find the value of x. But we must also remember that if we do something to one side then it will happen to the other side as well. If we took away 2 from x we would have to do it to the 9 as well so

2x - 2 = 9

→ Subtract 2 from both sides to isolate 2x

2x = 11

→ Divide both sides by 2 to isolate x

x = 5.5

Answer 2

A linear equation is an equation of a straight line, written in one variable.

(a).The desired equation is,  $2x-2=9$

(b). After solving, We get  x = 5.5

(a). Let us consider, number is x

   According to given statements,

     First double it,   2x

   Now, subtract 2, We get  2x - 2

Since, this is equal to 9.

So that,   $2x-2=9$ is the desired equation.

(b) Now, we have to solve above equation.

                $2x-2=9\\\\2x=2+9\\\\2x=11\\\\x=\frac{11}{2}=5.5$

Learn more:

https://brainly.com/question/8777708