According to the empirical rule, in a normal distribution, approximately % of the data lie within plus or minus 1 standard deviation of the mean, approximately % of the data lie within plus or minus 2 standard deviations of the mean, and approximately % of the data lie within plus or minus 3 standard deviations of the mean.

According to the empirical​ rule, in a normal​ distribution, approximately​ 68 % of the data lie within plus or minus 1 standard deviation of the​ mean, approximately​ 95 % of the data lie within plus or minus 2 standard deviations of the​ mean, and approximately​ 99.7 % of the data lie within plus or minus 3 standard deviations of the mean.

Therefore the required resulting equation is

6 x minus 15 y = negative 63.

Negative 15 x + 15 y = 90

Step-by-step explanation:

Given:

        ......................Equation ( 1 )

        ......................Equation ( 2 )

To Find:

Expression after multiplying to eliminate y term,

Solution:

So to eliminate 'y' term we need to multiply equation 1 by a constant 3 and equation 2 by a constant -5,  such that equations  becomes

.....( 1 )

 .....( 2 )

so now by adding new equation one and two we can eliminate y term that means -15y and +15y will get cancel,

Therefore the required resulting equation is

6 x minus 15 y = negative 63.

Negative 15 x + 15 y = 90