Can someone help me with algebra?

Question

How would you write these equations into in algebraic form. You may use parentheses.

Example: the product of a number (x) and 3

Answer: 3 x x, or 3x. The first x in 3 x x represents the word times.

1. The difference between three times a number (k) and 4.

2. 15 more than one-third of a number (m)

Answer 1

1. Difference means to subtract, so 3k-4

2. More means add, so 1/3m + 15

If this or any other answer to your question helps you resolve this issue, please select a "best answer." This motivates people to help you and rewards their research in your behalf.

Cheers,
Bruce

Answer 2

When translating sentences into math expression, there are a few things you can do to help make sense of it. I like to sometimes work backwards, starting with the last part of the sentence. Sometimes just saying the sentence in your own words or wording it differently can help. For example if you say, "three times a certain number minus 4" for the first problem, it might make a lot more sense.

three times a certain number minus 4

3 * K or 3K is three times some unknown number. 4 is, well, 4. So you have 3K - 4.

Therefore:
The difference between three times a number (k) and 4 would be 3K - 4

For number 2 working backwards I think would help the most. Start with one-third of a number. How do you write that? What's one third of 5? 5/3. What's one third of anything? anything/3 or x/3 or m/3 (as the case may be). What does "more than" indicate? Addition. So we're adding 15 to one-third of an unknown number.

15 + m/3

Answer 3

1) 3k - 4

2) 1/3m + 15

Answer 4

1. 3k-4
2. 1/3m+15

Answer 5

y=3k-4
y=(m/3)+15