Answer:
x = 7
y = 11
z = 14
Step-by-step explanation:
x + y + z = 32
Let's say the youngest is x, middle is y and oldest is z.
y= x+4 (age of the youngest + 4)
z= 2x (twice as old)
We can replace y and z in the main equation above with these values that contain x.
x + (x + 4) + 2x = 32
4x = 28, divide both sides by 4
x = 7
y = x + 4 = 7 + 4 = 11
z = 2x = 2*7 = 14
And to check: 7 + 11 + 14 = 32
How to find the percent of change between numbers
First: work out the difference (increase) between the two numbers you are comparing.
Increase = New Number - Original Number
Then: divide the increase by the original number and multiply the answer by 100.
% increase = Increase ÷ Original Number × 100.
If your answer is a negative number, then this is a percentage decrease.
To calculate percentage decrease:
First: work out the difference (decrease) between the two numbers you are comparing.
Decrease = Original Number - New Number
Then: divide the decrease by the original number and multiply the answer by 100.\
% Decrease = Decrease ÷ Original Number × 100
If your answer is a negative number then this is a percentage increase.
If you wish to calculate the percentage increase or decrease of several numbers then we recommend using the first formula. Positive values indicate a percentage increase whereas negative values indicate percentage decrease.
The answer is 24.22%
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The Tenths place because it's the first
