All categories

3 years ago

X -(4x- 7) = 5 x- ( x+ 21

Mathematics

1 answer:

Solnce55 [7]3 years ago

6 0

Answer:

x=4

Step-by-step explanation:

The question is

Find the value of x

we have

$x-(4x-7)=5x-(x+21)$

solve for x

Eliminate parenthesis both sides

Remember that

$(-1)(-1)=+1\\(-1)(+1)=-1$

$x-4x+7=5x-x-21$

Combine like terms

$-3x+7=4x-21$

Group terms that contain the same variable

$4x+3x=7+21\\7x=28\\x=4$

You might be interested in

A cylindrical water tank has a radius of 6 feet and a height of 20 feet. A larger tank with the same height has a volume that is

likoan [24]

Answer:

Radius of large cylinder $= 10.39 feet\\$

Step-by-step explanation:

Volume of the larger tank is three times the volume of smaller tank

Volume of smaller tank

$= \pi r^{2} h\\= (3.14) * 6^{2} * 20\\= 2260.8 ft^{3} \\$

Volume of larger tank

$= 3 * 2260.8 ft^3\\= 6782.4 ft^3\\$

Or it can also be written as

$\pi r^{2} h = 6782.4 ft^3\\(3.14) * ( r^2) 20 = 6782.4 ft^3\\r^2 = 108\\r = 10.39$

6 0

3 years ago

What is the simplified form of the expressions? a. −6a2b−1 b. 5/y−3

Karo-lina-s [1.5K]

Answer:

-6a²/ b

5y³

Step-by-step explanation:

-6a²b⁻¹

-6a²/ b

5/ y⁻³

5 / 1/ y³

5 * y³/1

5y³

8 0

3 years ago

HELP ME........................................................................

GaryK [48]

Answer: 17
2^2 is 4
45/9 is 5
Multiply 4•5 to get 20
Subtract 3

8 0

3 years ago

Read 2 more answers

Find the slope of the line that contains these two points. (2, -5) and (7, -10)

Paul [167]

M= $\frac{y1-y2}{x1-x2}$ = $\frac{-5-(-10)}{2-7}$ = $\frac{5}{-5} =-1$
Answer: slope is -1

4 0

3 years ago

Read 2 more answers

Is the following real-world scenario a Quadratic, Exponential, or Linear function?

navik [9.2K]

Answer:

idk

Step-by-step explanation:

srry

5 0

3 years ago

Read 2 more answers