13 = 11 - 4x
Two step equation please help?

And we can find this probability using the complement rule and with the normal standard distribution or excel like this:

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

For this case we have two resistors with the following distributions:

And for this case we want the following probability:

First we need to find the distributon for

Since both are normally distributed we have that a linear combination of normal distributions is also normal, so then we have this:

And we can use the z score formula given by:

And using this formula we got:

And we can find this probability using the complement rule and with the normal standard distribution or excel like this: