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qwelly [4]
2 years ago
5

A fridge costs €336 after a price increase of 40%. what was the original price

Mathematics
1 answer:
Mazyrski [523]2 years ago
5 0

the original cost is "x", which is the 100% of the original price, and we also know that €336 is its price increased by 40%, namely 100% + 40% = 140%, so

\begin{array}{ccll} amount&\%\\ \cline{1-2} x & 100\\ 336& 140 \end{array} \implies \cfrac{x}{336}~~=~~\cfrac{100}{140} \\\\\\ \cfrac{x}{336}=\cfrac{5}{7}\implies 7x=1680\implies x=\cfrac{1680}{7}\implies x=240

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X = Juan's age
y = Eliza's age

Some key words/phrases we can use to help us make the equation are:

-is (whatever comes after this word usually equals the end result, or what it equals)
-two years younger
-than
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just break it down :)

x/2 (half her brother's age) - 2 (two years younger) = y (Eliza is...)

| basically,
v

x/2 - 2 = y
So if Juan is 6, then we need to plug in 6 for x.

6/2 - 2 = y

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1 = y

ANSWER: Eliza is one year old.
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Homework
jenyasd209 [6]

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Answer:

<h2>4</h2>

Option A is the right option.

solution,

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Hope this helps..

Good luck on your assignment..

8 0
3 years ago
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