How do you solve the following system: #2x-y/2=4, 5x+2y=20 #?
Use linear algebra to solve for x, and then plug the solution back in to solve for y. You will find that
Let's align the equations, first and foremost:
To eliminate y, we'll multiply the entire top equation by 4, which will make that
Now, let's plug it back into one of the equations to solve for y: