Question

Can someone explain to me simultaneous equations

x + y = 8 and y - x = -2, then y =

Answer 1

the solution has to fit both conditions

Answer 2

x + y = 8

let x = (4+n), let y = (4-n)

(4+n) + (4-n) = 8 fits this one

solve in y-x = -2

(4-n) - (4+n) = -2

Answer 3

wait what? this is for substitution method or elimination method?

Answer 4

@amistre64's method is neither method.
Given that you have no leading coefficient on either variable, you can simply use substitution method.

Answer 5

its a substitution method, something Diophantus might do.