How do you solve the following system?: #-x -4y =31, x -y = -42#
See the entire solution process below:
Step 1) Solve the second equation for
Step 2) Substitute
Step 3) Substitute
The solution is:
This system of equations is a perfect scenario for eliminating
Additive inverses give 0 when added together.
NOte that in this case the solutions are easier to work with as mixed numbers rather than as improper fractions which tend to involve large numbers.