
whatever the amounts of "x" and "y" are, they must add up to 5Liters
thus x + y = 5
and whatever the concentrated quantity is in each, they must add up to (5)(0.14)
notice, that we use the decimal notation for the amount of juice concentration, that is, 15% is just 15/100 or 0.15, and 14% is just 14/100 or 0.14 and so on, recall that "whatever% of something" is just (whatever/100)*something
thus

solve for "x", to see how much of the 15% juice will be needed
what about "y"? well, y = 5 - x
Answer:
22%
Step-by-step explanation:
The percentage of tax can be found by calculating the percent change.
new - old / old
6084 - 7800 / 7800
= -0.22 or -22%
This means the price decreased by 22%, meaning you paid 22% in taxes.
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This is a word problem signifying an algebraic expression.
Translating this to mathematics:

add 4 to both sides.
divide 16 to both sides.
this is:
Question 4 is (1,2)
Question 5 is (1,0)
These are are definitely correct
20
the input value in the x column is multiplied by 5 to get the output value in the y column