All categories

3 years ago

Enter the value for x that makes the equation 3x – 5 = 7x - 21 true.

Mathematics

2 answers:

Nitella [24]3 years ago

8 0

Answer:

Step-by-step explanation:

3x-5=7x-21

3x-7x=5-21

-4x=-16 ( divide by -4 both sides)

x= 4

AlexFokin [52]3 years ago

8 0

Answer:4

Step by step solution:

3x-5=7x-21
-5=4x-21
16=4x
x=4

You might be interested in

What is 51.5% of 845 million

Masja [62]

The answer is 435,175,000.

4 0

3 years ago

Pleasee help, thank you so much

dezoksy [38]

Answer:

-2

Step-by-step explanation:

Use the slope formula when given two points

Slope formula = $\frac{y_2-y_1}{x_2-x_1}$

( the x and y values are determined by the given points )

Given the points ( 0 , 5 ) and ( 1 , 3 )

Plug in the x and y values of the given points into the formula

( remember y values on top x values on bottom )

$slope=\frac{5-3}{0-1} \\5-3=2\\0-1=-1\\slope=\frac{2}{-1} =-2$

Hence, the answer is D

5 0

3 years ago

1. Solve the equation using the zero-product property.<br> -x(5x – 4) = 0

Oxana [17]

Answer:

x = 0, 4/5

Step-by-step explanation:

The zero-product property states that if the product of a and b is zero, then either a = 0, b = 0, or both terms equal zero

Here our a term is -x and our b term is (5x - 4)
Setting each term equal to zero and solving for x we get
-x = 0 → x = 0
5x - 4 = 0 → 5x = 4 → x = 4/5

6 0

3 years ago

The plane 15x − 12y + 20z = 60 is represented by which graph below? Notice the z-axis.

nikdorinn [45]

Answer:

Step-by-step explanation:

I did it

8 0

2 years ago

Please I need this ASAP will give you the Brainiest answer.

k0ka [10]

Answer:

Step-by-step explanation:

5 0

3 years ago