Answer:
x = 4
Step-by-step explanation:
You may want to make everything into the same fraction to make the math easier. Because x/4 is the smallest fraction, make all of the other numbers with x match it.
3x = 12x/4, x/2 = 2x/4.
Now, 12x/4 - x/4 = 11x/4.
11x/4 + 9 = 1 - 2x/4 - 5. Now add x to one side to solve x.
13x/4 +9 = 1 - 5
13x/4 + 9 = -4
13x/4 = -13 (multiply by four on each side)
13x = -52
x = 4
So... let's change the concentration percentage to decimal format. .. so 40% is just 4/100 or 0.4 and so on.

so... whatever "x" and "y" may be, we know the must add up to 6 liters.
and whatever 0.4x and 0.8y are, we also know, they must add up to a 3 of concentrated amount.
thus

solve for "x", to see how much of the 40% solution will be needed.
what about "y"? well, y = 6 - x.
F(x) = 2(x + 3), now if we distribute the 2, we get 2x + 6.
we know the lbs of apple is "x", and therefore, the lbs of orange will be the constant 3.
2x will then stand for the price for "x" lbs of apples.
and 2*3 will stand for the price of "3" lbs of oranges, which is 6 bucks.
since the 2 is multiplying the lbs quantity, it must then be the price, so both cost 2 bucks each per pound.
Answer:
0
Step-by-step explanation:
-20.5 is the same as -20.5
, since anything to the zero power is equal to 1.
-12/13, as you make it into an improper fraction so 12×-1+1=13 so the 13 goes over the 12 to get -13/12 than you flip it to get the reciprocal with is -12/13