Solve the simultaneous equation, giving your answer in base 2.

11×+11y=1001
10×+y=11

1 answer

× is the multiplication operator
x is a variable name
Don't you have an x key on your keyboard? (right next to z)

multiply the 2nd equation by 11 and you have
11x+11y = 1001
110x+11y = 1001
subtract to get
11x = 0
x = 0
so y = 11