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azamat
3 years ago
15

2x+7y= -5 5x - 7y = 14

Mathematics
2 answers:
il63 [147K]3 years ago
8 0

Answer:

19

Step-by-step explanation:

Jlenok [28]3 years ago
5 0

Let's solve for x:

2x+7y=−5

Step 1: Add -7y to both sides.

2x+7y+−7y=−5+−7y \\ 2x=−7y−5

Step 2: Divide both sides by 2.

\frac{2x}{2}  = \frac{7y−5}{2}\\ x=  \frac{ - 7}{2}  y+ \frac{ - 5}{2}

Therefore, the answer for the first one will be x = -7/2 y + -5/2.

Let's solve for x.

5x−7y=14

Step 1: Add 7y to both sides.

5x−7y+7y=14+7y \\5x=7y+14

Step 2: Divide both sides by 5.

\frac{5x}{5} = \frac{7y + 14}{5} \\ x= \frac{7}{5} y+ \frac{14}{5}

Therefore, the answer for the second one will be x = 7/5 y + 14/5

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3 years ago
Read 2 more answers
simplify the difference. (–7x – 5x4 5) – (–7x4 – 5 – 9x) a. 2x4 2x 10 b. –14x4 10x 10 c. –14x4 – 10x 10 d. 2x4 2x 8
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If you would like to simplify the difference <span>(–7x – 5x^4 + 5) – (–7x^4 – 5 – 9x), you can do this using the following steps:

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The correct result would be </span><span>a. 2x^4 + 2x + 10.</span>
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3 years ago
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Step-by-step explanation:

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So we can clearly see that percentage change is a positive change. This means that the Value after change is higher than value before the change. So the percent of change is an increase.

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