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atroni [7]
3 years ago
13

7n + 5 =68.... how to solve this problem and show my work​

Mathematics
2 answers:
mart [117]3 years ago
7 0

Answer:

n=9

Step-by-step explanation:

7n+5=68  Subtract 5 on both sides.

    <u>-5  -5</u>

7n=63       Divide both sides by 7.

<u>/7   /7</u>

n=9

Hope this helps! Have a nice day ^^

snow_tiger [21]3 years ago
5 0

Answer:

n = 9

Step-by-step explanation:

1) Move similar terms to one side. Here we are moving the 5 over to the side with 68 by subtracting it. We also have to subtract 5 from the other side too (what you do to one side you must do to the other)

7n + 5 = 68

     - 5   -5

      7n = 63

2) Isolate the variable. We do this by dividing the 7 from 7n. We also have to divide 7 from other other side too.

     7n = 63

     /7    /7

       n =9

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What is 4x-5/3+2x=7+2/9x+2
ch4aika [34]

Simplifying the expression gives 36x^2 - 82x - 10 = 0

<h3>How to simplify the expression</h3>

Given the expression;

4x-5/3+2x=7+2/9x+2

\frac{4x - 5}{3 + 2x} = \frac{9}{9x + 2}

Cross multiply

4x - 5( 9x + 2) = 9 (3 + 2x)

Expand the bracket

36x^2 + 8x - 45x - 10 = 27x + 18x

Collect like terms

36x^2 + 8x - 45x - 27x - 18x = 0

Add the like terms

36x^2- 82x - 10 = 0

Thus, simplifying the expression gives 36x^2- 82x - 10 = 0

Learn more about algebraic expressions here:

brainly.com/question/723406

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3 0
2 years ago
A 40-foot pipe is cut into three sections. The longest section is three times as long as the shortest, and the middle-sized sect
PtichkaEL [24]

Answer:

P=40

a + b + x = P

a = 3x    

b = x + 5

substitute for b & y

3x + (x+5) + x = 40

Step-by-step explanation:

longest section 1 = a

mid length section 2 = b

shortest section 3 = x

P=40

a + b + x = P

a = 3x    

b = x + 5

substitute for b & y

3x + (x+5) + x = 40

5x + 5 = 40

5x = 35

x = 7

b = 12

a = 21

5 0
3 years ago
How many time can 4 go in to 3​
vfiekz [6]

Answer:

0.75 times.

Step-by-step explanation:

Hope i helped and can i pls have brainliest.

3 0
3 years ago
Salma used a photocopier to dilate the design for a monorail track system. The figure shows the design and its photocopy: Two ir
oksian1 [2.3K]

Answer:

The answer is 34

Step-by-step explanation:

The ratio of AD:EH is 1:2, so therefore the other line segments have the same ratio. Using this logic, we see that DC is equal to 17 m, and we need to find GH. All we do now is double the measurement of DC since the ratio of the two shapes is 1:2.

Therefore, 17 * 2 = 34

5 0
3 years ago
Read 2 more answers
8/11 x (5/9 - 1/6) ÷ 1 5/9​
Oksana_A [137]

Answer:

28/165

Step-by-step explanation:

You always use the order of operations, and the order of operations says to solve parentheses first, so you would solve 5/9 - 1/6, and get 7/18.

You would do exponents next, if there were any, but there is not, so you move on to the next operation(s).

The next operations are multiplication and division. From left to right, multiplication is first, so you solve 8/11 x 7/18 and get 28/99. Then, there is a division problem to solve. The problem is 28/99 ÷ 15/9. If you solve that correctly, you will get the answer 28/165.

The next step would be to simplify 28/165, but it cannot be simplified, so you are left with the answer 28/165.

4 0
3 years ago
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