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3 years ago

1) What is the first x in x + 3x = 16?

Mathematics

1 answer:

Lyrx [107]3 years ago

5 0

1. x=22/5
2. x=4
3. x=4

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Gekata [30.6K]

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3 years ago

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Marina86 [1]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

If y varies directly as x and y = 21 when x = 5, find x when y = 42.

Lorico [155]

Answer: 10

<u>Step-by-step explanation:</u>

varies directly means: $\frac{y}{x} = k$

Step 1: solve for k ⇒ $\frac{21}{5} = k$

Step 2: plug in the given value and k to solve for the missing value: $\frac{42}{x} = \frac{21}{5}$

42(5) = 21(x)

$\frac{42(5)}{21} = \frac{21(x)}{21}$

2(5) = x

10 = x

5 0

3 years ago