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Luda [366]
3 years ago
12

What is x for -7=9x-7

Mathematics
2 answers:
FromTheMoon [43]3 years ago
8 0

Answer:


Step-by-step explanation:

-7=9x-7

Rewrite the equation

9x-7=-7

Add 7 both sides

9x=7-7

Subtract 7-7 right side

9x=0

Divide 9 both sides

X= 0/9

Solved

X= 0

To check

9x-7 = -7

9(0)-7= -7

-7=-7

It checks



givi [52]3 years ago
5 0

x equals zero

-7=9x-7

Add the -7 over: 0=9x

Divide both sides by 9: 0=x

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<img src="https://tex.z-dn.net/?f=x%20%20%5Cdiv%203x%20-%202%20%3D%201%20%5Cdiv%203x%20-%204" id="TexFormula1" title="x \div 3x
Maurinko [17]

Hello from MrBillDoesMath!

Answer:

x = 1/2 (1 +\- i sqrt(23))

Discussion:

x \3x - 2 =   (x/3)*x - 2   =  (x^2)/3 - 2     (*)

1 \3x - 4   =  (1/3)x - 4                               (**)

(*) = (**)   =>

(x^2)/3 -2 = (1/3)x - 4        => multiply both sides by 3

x^2 - 6 = x - 12                 => subtract x from both sides

x^2 -x -6 = -12                   => add 12 to both sides

x^2-x +6  = 0

Using the quadratic formula gives:

x = 1/2 (1 +\- i sqrt(23))

Thank you,

MrB

4 0
3 years ago
X-7=13answer and how to solve?
Ahat [919]
X-7=13
move -7 to the right side of the equation, change the sign from negative to positive when you move it
x-7+7=13+7
x=13+7
x=20
4 0
3 years ago
5-a/8=4/7 solve for a show your work
timama [110]
Subtract 5 from both sides
a/-8 = 4/7 - 5

simplify 4/7 - 5 to 31/-7
a/-8 = 31/-7

multiply both sides by 8 
-a = 31/-7 x 8

simplify 31/7 x 8 to 248/7
-a = 248/7

multiply both sides by -1.
The answer is a = 248/7

The words are the explanations of the steps and the dark bolded words are the work shown for each step.
6 0
3 years ago
Help please area geometry !!
elena55 [62]

Answer:

37.5 cm^2

Step-by-step explanation:

The area of a parallelogram is

A = bh  where b is the base and h is the height

A = 7.5 * 5

A = 37.5 cm^2

4 0
3 years ago
Read 2 more answers
2x = 5x - 30 how do i get x
solmaris [256]
Get x to one side by subtracting 2x by 5x.

-3x = -30

Then divide both sides by -3 to get x = 10

Have a nice day.
6 0
3 years ago
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