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Black_prince [1.1K]
3 years ago
11

Help me plzzzz...... .

Mathematics
2 answers:
Vlada [557]3 years ago
7 0

x = 4.5 so it is 3/-8 = 4.5/12

erastovalidia [21]3 years ago
6 0

Answer:

x = \frac{-36}{8} = -4.5

Step-by-step explanation:

WE are given with an equation and we have to solve it for the value of x

As the given equation is

\frac{-3}{8}=\frac{x}{12}

For this we have to use the rule of cross multiplication which states that

if we have two fractions such that

\frac{x}{y}=\frac{a}{b}

then by cross multiplication

b * x = a * y

so similarly for the given equation we have

\frac{-3}{8}=\frac{x}{12}

By cross multiplication

- 3 * 12 = 8 * x

multiplication gives

-36 = 8 x

Dividing both sides by 8

\frac{-36}{8}=\frac{8x}{8}

\frac{-36}{8}=x

So this is the answer in fraction in point form it would be

x = -4.5



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

Let x = kg of 15% copper alloy

Let y = kg of 60% copper alloy

Since we need to create 90 kg of alloy we know:

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Answer:

Step-by-step explanation:

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