# math

posted by .

how do you solve these problems?

1.2x/3 + 1/3 - x/8= 2/3

2. 3n + 9/10 + n/5= -2 3/10

3. 3k/4 - 28 - 2k/3 = 37

thank you can you please show me step by step how you got the answer?

• math -

I will do one for you, and you try the other two

2.
3n + 9/10 + n/5= -2 3/10
3n + 9/10 + n/5= -23/10
looks like 10 is the lowest common denominator, so multiply each term by 10

30n + 9 + 2n = -23
32n = - 23 - 9
32n = - 32
n = -1

hint: for the first, multiply each term by 24
for the third, multiply each term by 12

• math -

i got for # 3 8/13 and plugged in the number for the letters and got it wrong. what is the correct way to solve it thank you

• math -

#3
3k/4 - 28 - 2k/3 = 37
times 12
9k - 336 - 8k = 444
k = 444+336
k = 780

check:
Left side = 3(780)/4 - 28 - 2(780)/3
= 585 - 28 - 520
= 37
= right side

My answer is correct, how did you get 8/13 ?

## Similar Questions

1. ### math

there's a question that I don't understand and the direction says that 'solve problems as combination integer problems.remember to rewrite all double sign problems as combination problems before solving' and here's a question 50- -61+ …
2. ### algebra

show how to solve these problems: 1. 6x - y = -4 2x + 2y = 15 answer:x = 1/2 y = 7 2. x +y = 1 x = -1/3 2x - y = -2 y = 4/3 3. x - y = 3 x = 5/2 6x + 4y = 13 y = - 1/2 I just need to know how to solve these problems. Please show me …
3. ### Math

I am having problems understanding how to solve problems like the following: a2 + b2 = c2 Please help me where I can understand solving problems such as the one above.
4. ### English

It is very rude of you to behave like that. It is very wise of you to answer the question. It is very stupid of you not to solve the math problems. It is smart of you to solve the math problems. It is careless of you to hit the jar …
5. ### Math

For problems 1 and 2, determine how many solutions there are for each triangle. You do not have to solve the triangle. 1. A = 29°, a = 13, c = 27 2. A = 100.1°, a = 20, b = 11 For problems 3-6, solve each triangle using the Law of …
6. ### Math

Solve for S: r^2s-5s=7. Solve for b: L= 4a^2b. I'm confused about how to solve these problems. Could someone show me the steps?
7. ### Math

16.Eliot spent 24 minutes solving 8 math problems.At that rate, how many math problems can he solve in 54 minutes?