Question

Find the solution to the system of equations x + y = 1 and x - y = 1.

Answer 1

x=1, y=0

Explanation:

x+y=1

x-y=1

--------

2x=2, x=1

When it is written out this way, we can easily have a look for ourselves which variable we can easily eliminate. As for this equation, it would be the variable y. When we add the two systems together we would get 2x=2, which makes x=1. When we plug in x as 1 to the first equation, we get 1+y=1, in which y is 0.

1+y=1

y=0

--------------------

x=1, y=0

Answer 2

15x

Explanation:

add

multiply

divide

multipcation