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Oksanka [162]
3 years ago
15

3 (7-9x)-5 (5x+1)=-8 (9x-4)

Mathematics
1 answer:
Whitepunk [10]3 years ago
5 0
Open the equation
21-27x-25x-5= -72x+32
collect like terms
21-5-27x-25x=-72x+32
16-52x=-72x+32
collect like terms
-52x+72x=32-16
-20x=16
divide both sides by -20
x= -16/20
divide into the lowest term
x= -4/5

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Equation to find original price if sale price of $429 is a 34% discount
Burka [1]

Answer:

The original price is $650

Step-by-step explanation:

There's an actual algebra method for this, but this is my method because I find it way easier to remember.

Since the most you can discount out of an item is 100% (well, it's considered free then) let's subtract 100 - 34, which is 66.

Now, turn it into a decimal because it makes the numbers easier- 0.66.

Since when you're finding the discount of an original price, you multiply the original price by the discount- instead for finding the original price for a discounted item we divide $429 by 0.66 instead, since when you divide a number by another number that's under 1 the quotient is a larger number.

So, 429 ÷ 0.66 = 650.

Therefore, the original price of the $429 sale price for a 34% discount is $650.

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Answer:

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Step-by-step explanation:

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2 years ago
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melomori [17]

Answer:

I don't know if you wanted it expanded using "Pascal's Triangle" or "Binomial Theorem" but either way is the same. Your expanded equation is:

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I hope this is any help to you, have a nice day.

Step-by-step explanation:

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Step-by-step explanation:

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