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goldenfox [79]
3 years ago
7

6 = -8
" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
Cloud [144]3 years ago
8 0
\frac{y}{3}-6=-8
add 6 to both sides
\frac{y}{3}-6+6=-8+6
\frac{y}{3}=-2
multiply both sides by 3
3\frac{y}{3}=-2(3)
y=-6
lora16 [44]3 years ago
3 0
You need to get y to 1. So multiply everything by 3. The equation you get is y-18=-24. You need to get y by itself so add 18 to both sides. The equation you get is y=-6. So the answer is y=-6. Hope this helps! ;)
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Answer:

Brand A = 21 heart-rate watches.

Brand B = 13 heart-rate watches.

Step-by-step explanation:

Let A be the number of Brand A heart watches and B be the number of Brand B heart watches.

We have been given that a nonprofit community health organization purchased 34 ​heart-rate watches for use at a wellness center.

We can represent this information in an equation as:

A+B=34...(1)

We have been given that in a certain​ year, brand A of​ heart-rate watch cost ​$39.99 and brand B cost ​$59.99 and the organization spent ​$1619.66 for the​ watches.

We can represent this information in an equation as:

39.99*A+59.99*B=1619.66...(2)

We will use substitution method to solve our system of equations.

From equation (1) we will get,

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Substituting A=34-B in equation(2) we will get,

39.99*(34-B)+59.99*B=1619.66

1359.66-39.99*B+59.99*B=1619.66

-39.99*B+59.99*B=1619.66-1359.66

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Therefore, the organisation purchased 13 heart-rate watches of brand B.

Now let us substitute B=13 in equation (1).

A+13=34

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