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Brut [27]
3 years ago
12

Three fifths of a number y is negative 9. What is the number?

Mathematics
2 answers:
Maru [420]3 years ago
7 0

Answer:

The answer is y=-15

Step-by-step explanation:

In order to determine the number, we have to express the problem into an equation. Every time that we want to know a value of a variable, we have to express an equation that it contains the variable.

Let's express every part of the statement:

Three fifths=\frac{3}{5}

A number= y

negative 9= -9

Putting together every part into an equation:

\frac{3}{5}y=-9\\y=\frac{5}{3}*(-9)\\y=5*(-3)\\y=-15

Finally, the value of the number "y" is -15.

klio [65]3 years ago
3 0
\frac{3}{5}y=-9 \ |*5 \\\\ 3y=-45 \ |:3\\\\ y=-15
or
\frac{3}{5}y=-9 \\\\ 0,6y=-9 \ |*10\\\\ 6y=-90 \ |:6\\\\ y=-15
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