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wlad13 [49]
4 years ago
15

Solve for x. Justify each step using the properties of equality. Be sure to include your check!

Mathematics
1 answer:
lesantik [10]4 years ago
4 0

Answer:

x = -1/2

Step-by-step explanation:

9 - 4x = 11

put 9 on other side and subtract

-4x = 2

divide each side by 4

-x = 2/4

simplify and swap signs

x = -1/2

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Answer:

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Step-by-step explanation:

The question is to simplify the expression  (2r^2+r-1)-(3r^2+4r-5)

First, we can eliminate the 2nd parenthesis expression by changing signs of all the terms since there is a "-" sign in front. Then we add the "Like Terms". The process is shown below:

(2r^2+r-1)-(3r^2+4r-5)\\=2r^2+r-1-3r^2-4r+5\\=-r^2-3r+4

The first answer choices (has some typos) is correct. The correct answer is  -r^2-3r+4

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