SOLUTION: Hi can someone help me with these problems,and show the work so I can try and figure how to do next problems. Thanks 1. Write an equivalent expression without using the grouping

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Question 238135: Hi can someone help me with these problems,and show the work so I can try and figure how to do next problems. Thanks
1. Write an equivalent expression without using the grouping symbols: -(3x + 5)
2. Clear fractions or decimals, solve, and check: 1/2+4m=3m-5/2
3. Combine like terms, and write in descending order: 3/4 x^3+4x^2-x^3+7
Answer by solver91311(24713) (Show Source):
You can put this solution on YOUR website!

1.

Change it to:

And apply the distributive property:

2. You need to write back for this one. Not sure whether you mean:

or

...and there are other interpretations.

3.

The only like terms are the terms. One has a coefficient of and the other has a coefficient of . Just add: and the sum is then the coefficient on your term. When you are done, the exponents should get smaller from left to right.

John