All categories

3 years ago

9-2x=7x How do I solve for x?

Mathematics

2 answers:

Olin [163]3 years ago

3 0

Answer:

x= -1

Step-by-step explanation:

First add 2x to the 7x it will look like this

9=9x

Now you need x by itself so divide 9 on both sides it will look like this

1=x and thats your answer just swap the x and the 1

blagie [28]3 years ago

3 0

Answer:

The answer to the equation is 1.

Step-by-step explanation:

When having an algebraic equation, you have to move all of the variables on one side. Therefore, you can move the -2x or the 7x. However, to make a positive number, I would recommend to move the -2x.

To move the -2x to the other side, you add 2x to the both sides of the equation. Since the original equation is 9-2x=7x, you will add the 2x to it, so your equation will now look like this: 9-2x+2x=7x+2x. Once simplifying that down, you will have 9=9x. Then, you can divide the coefficient, so the 9 on the left side, and the 9 on the right side. After this, you will have 1=x. AKA x=1, which is the answer to the equation!

You might be interested in

What is the probability of rolling a number less than 5 and flipping heads?

lys-0071 [83]

4/12 = 33%

There are 12 options in total. If you get rid of the tails and numbers 5 and 6, there are 4 options left. So that means 4 out of 12 (4/12). 4/12 in percentage form is 33%.

I hope this helped. Brainliest appreciated.

7 0

3 years ago

Simplify -1-5 + 21.

BlackZzzverrR [31]

Answer:

Step-by-step explanation:

-1-5=-6

21-6=15

6 0

4 years ago

Two linear functions of x are shown. Which Statement about the functions is true?

kolbaska11 [484]

Answer:

OPTION D: The rate of change of Function 2 is less than that of Function 1.

Step-by-step explanation:

From the table, we will determine the equation of function 2.

From the table, g(1) = 14 & g(-3) = - 86

Since, it is a linear function it should have been of the form, y = a + bx.

We will denote Function 2 as g(x).

So, g(1) = 14 = a + b . . . (1)

And g(-3) = -86 = -3a + b . . . (2)

From (1), a = 14 - b

Substituting this in (2), we get:

-86 = -3(14 - b) + b

⇒ - 86 = - 42 + 4b

⇒ - 44 = 4b

⇒ b = -11

So, a = 14 - (-11)

⇒ a = 25

So, equation of function 2 is: y = 25 - 11x.

Hence, Option A and B are eliminated.

In a linear equation of the form, y = ax + b, y - intercept = b.

So, in function 1, y - intercept = 19

And in function 2, y - intercept = -11

Clearly, OPTION C can be eliminated.

Now, rate of change of Function 1 = $\frac{dy}{dx} = 30$

and rate of change of Function 2 = $\frac{dy}{dx} = 25$

Therefore, we can say that the rate of change if function 2 is less than that of function 1.

Option D is our answer.

5 0

3 years ago

Write the equation of a line for the graph:

zzz [600]

Answer: y=1/3x-2

Step-by-step explanation:

To find the equation of the line, we need the slope and y-intercept. To find the slope, we can take any two points on the graph and use the formula $m=\frac{y_2-y_1}{x_2-x_1}$ . To find the y-intercept, we find the point that crosses the y-axis. The two points on the graph are (0,-2) and (3,-1).