If you would like to solve the equation x/3 = x/2 - 2 for x, you can do this using the following steps:
<span>x/3 = x/2 - 2 /*6
</span>2x = 3x - 2 * 6
2x = 3x - 12
2x - 3x = -12
-x = -12
x = 12
The correct result would be x = 12.
If you type in one or two of the questions on Google, all the answers will pop up. You're welcome!!:)
Here are the equations
x+y=48
x/y=5/8
but here's how I would solve it
5+7=12
48=12units
divide by 12 both sides
4=1unit
males=5 unit
4=1unit
times 5
20=5unit=males
females=7unit
4=1unit
times 7
28=7unit=females
Answer:
29.03 units
Step-by-step explanation:
x^2 = 10^2 + 19^2 - 2*19*20 cos 122
= 100 + 361 - 720 * -0.52992
= 842.54
x = 29.03
Without the actually predicted values in comparison to the real values it is only possible to give a very likely answer based on their scale:
a) is 25 million off, which sounds bad but when compared to a few billion in population it's not even 1%
b)3 billion is more than half the world population as error: very unlikely
c)154 billion, unlikely that a prediction is off by a factor of ~30
d)same as c
so a) is most likely the solution, but in theory the predictions could be arbitrarily bad (things like negative population, or extreme growths)