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2 years ago

How many solutions does the following equation have? x + 5 = x + 7

Mathematics

2 answers:

mojhsa [17]2 years ago

8 0

You can not have any solutions to this question seeing as at any point x +7 will always be 2 higher

Oksi-84 [34.3K]2 years ago

4 0

No solutions

Explanation: Any number you use, the equation of x + 7 will always be 2 more than x + 5

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6x+1 = -8x-13 pleasee

DiKsa [7]

Answer: $x=-1$

Add 8x to both sides

$6x+1+8x=-8x-13+8x\\14x+1=-13$

Subtract 1 from both sides

$14x+1-1=−13-1\\14x=-14$

Divide both sides by 14

$14x/14=-14/14\\x=-1$

5 0

3 years ago

Read 2 more answers

Solve the simultaneous equation, 2p - 3q = 4 3p + 2q = 9

Kobotan [32]

Answer:

p = $\frac{35}{13}$ and q = $\frac{6}{13}$

Step-by-step explanation:

Given equations:

2p - 3q = 4 -----------(i)

3p + 2q = 9 ------------(ii)

Let's solve this equation simultaneously using the elimination method

(a) Multiply equation (i) by 3 and equation (ii) by 2 as follows;

[2p - 3q = 4] x 3

[3p + 2q = 9] x 2

6p - 9q = 12 -------------(iii)

6p + 4q = 18 -------------(iv)

(b) Next, subtract equation (iv) from equation (iii) as follows;

[6p - 9q = 12]

- [6p + 4q = 18]

-13q = -6 -----------------(v)

(c) Next, make q subject of the formula in equation (v)

q = $\frac{6}{13}$

(d) Now substitute the value of q = $\frac{6}{13}$ into equation (i) as follows;

2p - 3( $\frac{6}{13}$ ) = 4

(e) Now, solve for p in d above

Multiply through by 13;

26p - 18 = 52

Collect like terms

26p = 52 + 18

26p = 70

Divide both sides by 2

13p = 35

p = $\frac{35}{13}$

Therefore, p = $\frac{35}{13}$ and q = $\frac{6}{13}$

8 0

2 years ago

f a rectangle has a perimeter of 70, a length of x and a width of x - 9, find the value of the length of the rectangle.

trasher [3.6K]

$( x + (x - 9)) \times 2 = 70 \\( 2x - 9) \times2= 70 \\ 4x - 18 = 70 \\ 4x = 70 + 18 = 88$
$x = \frac{88}{4} = 22$
the length is 22

and the width is
22-9=17

good luck

3 0

2 years ago

Acell phone company charges $40 per month for unlimited calling, and $0.20 per text message sent. If t represents

-Dominant- [34]

Answer: 40 + 0.21t

Step-by-step explanation:

If t is the number of texts last month and the initial fee for each month is $40 then you will have the expression 40+0.21t

3 0

2 years ago

21 x ________ ÷ 3 = 21 *

GrogVix [38]

Answer:

first one: 3

second one: b

third one: 3.2

Step-by-step explanation:

first one:

21 x ________ ÷ 3 = 21

rewrite equation:

21 ÷ 3 x ___ = 21

7 x ___ = 21

(21 / 7 = 3)

7 x 3 = 21

second one:

b x h ÷ h = ___

third one:

876 x 3.2 ÷ ______ = 876

2803.2 ÷ ___ = 876

(2803.2 / 876 = 3.2)

2803.2 x 3.2 = 876

7 0

2 years ago