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Darina [25.2K]
2 years ago
6

2x - y = 9 y=x-7 what is the answer

Mathematics
1 answer:
marshall27 [118]2 years ago
4 0

Answer:

x = 2

y = -5

Step-by-step explanation:

2x - y = 9

y = x - 7

2x - y = 9

2x - (x - 7) = 9

2x - x + 7 = 9

x + 7 = 9

x = 2

y = x - 7

y = 2 - 7

y = -5

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2 years ago
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Wittaler [7]

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See below

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2 years ago
-1/3x+2x=3 3/4 what does the variable represent?
svet-max [94.6K]
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So we get \frac{-1}{3}x+2x= \frac{-1}{3}x+ \frac{6}{3}x= \frac{-5}{3}x

Replacing this result with what we had before on the LHS, we get \frac{-5}{3}x=3 \frac{3}{4}= \frac{9}{4}

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⇒Don't forget about reciprocity rules when dividing.  This is the same as multiplying both sides by \frac{3}{-5}

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4 0
3 years ago
Read 2 more answers
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